Upstream qmail 1.01

[qmail] / CHANGES

19970415 version: qmail 1.01.
19970414 doc: tightened up qmail-upgrade.7.
19970414 code: rewrote rewrite().
19970414 code: implemented recipientmap. suggested by RDM.
19970414 doc: auto-configured qmail home directory in qmail-control.5,
         qmail-newu.8, qmail-pw2u.8, qmail-start.8, qmail-users.5.
19970414 port: Solaris needs socket libs for gethostname. impact: can't
         compile under Solaris. fix: use socket.lib for qmail-local.
19970412 code: introduced stralloc_starts.
19970412 code: introduced str_equal.
19970412 code: introduced str_start.
19970412 code: introduced byte_equal.
19970412 code: made an optional aliasempty arg for qmail-start.
19970412 code: made an aliasempty arg for qmail-lspawn.
19970412 code: changed ALIAS_EMPTY to an arg for qmail-local.
19970412 port: UnixWare returns >0 for SIOCGIFCONF. impact: ipme fails
         under UnixWare. fix: check for >=0, not =0. tnx JD.
19970412 port: DGUX does not have ranlib. impact: can't compile under
         DGUX. fix: added dgux line to make-makelib. tnx HWM.
19970412 code: changed maildir library to skip any filename beginning
         with dot. tnx SP.
19970412 doc: added FAQ entry about aliases with dots.
19970412 doc: clarified in qmail-inject.8 that default envelope sender
         is the same as _default_ From address.
19970411 code: renamed qmail-makectl as qmail-config.
19970411 code: renamed qmail-alias as qmail-local.
19970411 code: switched from signal library to sig library.
19970411 code: switched from qqtalk library to qmail library.
19970411 code: switched from getline library to getln library.
19970411 code: massive library cleanups.
19970411 code: revamped autoconfiguration system.
19970411 code: revamped configuration interface.
19970411 code: eliminated qmail-home.
19970411 code: eliminated tokenize.
19970220 qmail 1.00.
19970219 change: various documentation tweaks.
19970218 change: updated THOUGHTS.
19970218 change: talked about SPAWN_NUMD in FAQ. tnx EC.
19970210 change: noted in maildir.5 that readers should skip any name
         starting with a dot. tnx SP.
19970209 change: added note to splogger.8 about reliability. tnx BT.
19970209 change: added section to FAQ on slow sendmail switch. tnx BT.
19970206 change: added section to FAQ about dtcm. tnx PJG.
19970206 change: tweaked maildir.5.
19970201 change: added MH spost note to FAQ. tnx TU.
19970131 change: reorganized FAQ.
19970131 change: added web references to FAQ.
19970124 change: tweaked qmail-upgrade man page.
19970120 qmail 0.96, gamma.
19970120 change: removed various try* in auto-configuration.
19970120 bug: qmail-inject fails to quote argument addresses. impact:
         addresses containing special characters could be misinterpreted
         or rejected. tnx C2F. fix: use quote2().
19970120 portability problem: ESIX puts syslog() and openlog() into
         -lgen. impact: can't compile under ESIX. fix: put -lgen into
         LIBS for unix_sv. tnx RN.
19961221 qmail 0.95, gamma.
19961218 change: added various try* to TARGETS. tnx SA.
19961216 change: clarified in qmail-send.8 that virtualdomains does not
         apply to domains listed in locals.
19961216 change: slurpclose() now closes fd on out-of-memory. makes it
         more widely applicable.
19961215 change: replaced elm instructions in INSTALL.mbox with an
         explanation of what source change to make. tnx AB.
19961212 portability problem: under NEWS-OS, time_t needs sys/types.h.
         impact: couldn't compile under NEWS-OS. fix: include
         sys/types.h in predate.c. tnx TU.
19961211 change: used timeoutread, timeoutwrite in remoteinfo(). tnx
         REB.
19961210 portability problem: apparently some SGIs produce a systype of
         irix64. impact: couldn't compile on those systems. fix: handle
         irix64 in make-cmds. tnx M3S.
19961208 change: added note to maildir2mbox.1 about mbox locking.
19961208 qmail 0.94, gamma.
19961207 change: added QMAILDEFAULTDOMAIN, QMAILDEFAULTHOST,
         QMAILIDHOST, QMAILPLUSDOMAIN. tnx BTW.
19961206 cleanup: readsubdir() protects itself against name overflow,
         rather than depending on caller.
19961204 change: changed FAQ 7.3 to prohibit fixup relaying.
19961203 change: added note to FAQ about possibly having to put a space
         before "$SENDER" for uux. tnx FW.
19961202 change: added FAQ entry on QUEUE_EXTRA.
19961202 change: added FAQ entry on backups. tnx DP.
19961202 change: added note to INSTALL.mbox about qpopper. tnx VV.
19961201 change: replaced logger with splogger in FAQ 5.1. tnx FPL.
19961201 change: used netmask example for tcpcontrol in FAQ. tnx FPL.
19961201 change: added note to README about the mailing list. tnx FPL.
19961201 change: documented rcpthosts wildcards. tnx RN.
19961201 change: added note to FAQ about making mailx use datemail.
19961201 change: added datemail. function requested by several people;
         approach suggested by TG.
19961201 change: added predate.
19961129 change: added QUEUE_EXTRA, QUEUE_EXTRALEN.
19961129 change: qmail-remote bounces messages with partial final lines.
19961129 change: added atomcheck() to quote crappy atoms.
19961129 change: revised atomok() to let atoms deal with more crap.
19961127 change: qmail-send adds note to deferral if flagdying. tnx TG.
19961127 change: split off maildirbounce, maildir2qmtp, and maildir2smtp
         into a separate serialmail package.
19961126 change: eliminated beta success reports from README.
19961124 change: forced res_query() return value to fit inside incoming
         buffer size. allegedly there are buggy versions of res_query()
         that don't guarantee this.
19961122 qmail 0.93, gamma.
19961122 change: allowed empty arg list in forward.
19961121 change: qmail-smtpd now uses unknown (like qmail-qmtpd) rather
         than dying if environment variables are not set.
19961121 cleanup: reorganized helo handling in qmail-smtpd.c.
19961121 cleanup: eliminated newfield_rec.
19961121 cleanup: introduced DATE822FMT. used it in received.c.
19961121 cleanup: introduced received.c. used it in qmail-qmtpd.c,
         qmail-smtpd.c.
19961121 change: qmail-smtpd now generates a new timestamp for each
         message. tnx PJG.
19961121 cleanup: used stralloc in newfield.
19961121 cleanup: eliminated newfield_cc.
19961121 change: eliminated hfield_mort().
19961119 change: added 2-minute damper on tcpto.
19961118 change: wrote defaults for readfile controls in showctl.
19961117 change: control_readfile() now allows comments and blank lines.
         tnx LW.
19961117 change: qmail-start sets logger gid to GID_NOFILES.
19961117 bug: ipme_init() uses a fixed-length buffer for SIOCGIFCONF.
         impact: qmail-smtpd and qmail-remote will die if there are too
         many local IP addresses. tnx MD. fix: ipme_init() now
         dynamically allocates space, up to 200000 bytes, as long as
         SIOCGIFCONF keeps failing. note that this is a very widespread
         bug; it's in amd, exim, mrouted, named, nntpd, rarpd, sendmail,
         tcpdump, timed, xntpd, and probably dozens more programs.
19961117 portability problem: on BSD 4.4 and various other systems,
         SIOCGIFCONF will truncate long lists and return success.
         impact: on those systems, qmail-smtpd and qmail-remote will
         miss some local IP addresses if there are too many. fix:
         ipme_init() now checks whether there is enough space left in
         the buffer for another ifreq, plus 64 bytes JIC. yuck.
19961117 change: ipmeprint now flushes only at end.
19961117 cleanup: introduced subfdinsmall. used it in qmail-clean.c,
         qmail-qmtpd.c.
19961117 cleanup: introduced subfdoutsmall. used it in hostname.c,
         printbreak.c, printnumd.c, printsplit.c, qmail-alias.c,
         qmail-clean.c, qmail-getpw.c, qmail-qmtpd.c, maildir2smtp.c,
         maildir2qmtp.c.
19961117 change: moved subfderr buf up to 256 characters.
19961117 change: added maildirbounce. tnx MD, TG.
19961116 change: maildir2smtp and maildir2qmtp now print filenames for
         permanent bounces. tnx MD.
19961116 change: in SECURITY, ``eleven most recent sendmail security
         holes, five'' -> ``twelve most recent sendmail security holes,
         six.''
19961116 change: rewrote qmail-showctl more professionally.
19961115 change: added several tests to find-systype.sh. this will
         affect many systypes.
19961115 change: qmail-alias now treats most exit codes as soft errors.
19961115 change: revamped exit codes everywhere for 0, 100, 111.
19961114 change: added splogger.
19961114 portability problem: Sun's cc recognizes sqrt() as a builtin,
         even if math.h is not included and sqrt is defined statically.
         yuck. impact: when qmail is compiled with Sun's cc, next-retry
         times are all screwed up. tnx PJG. fix: my sqrt() is now called
         squareroot().
19961114 change: dns_ip() now recognizes [1.2.3.4]. tnx DS.
19961112 change: enabled x option in sendmail. tnx DS.
19961111 change: added SIGHUP handling to qmail-send. suggested by many
         people.
19961111 bug: control routines returned incorrect codes for some
         out-of-memory conditions. impact: none; conditions cannot
         happen with sane control files. fix: return -1.
19961111 change: added SIGALRM handling to qmail-send. suggested by many
         people.
19961111 change: eliminated flagnobreak (-b/-B) from qmail-pw2u.
19961111 change: qmail-getpw now allows hyphens inside usernames.
19961111 change: added users/append to qmail-pw2u. tnx G2A.
19961111 change: added badmailfrom to qmail-smtpd. requested by several
         people.
19961110 change: replaced elm instructions in INSTALL.mbox with a simple
         note to set incomingfolders in elm.rc. tnx AB.
19961110 change: replaced ``owner hack'' with ``variable envelope
         return paths'' throughout the documentation. tnx DS.
19961110 change: qmail-setup installs man pages as well as cat pages.
19961110 change: renamed qmail-newuser as qmail-newu. tnx G2A.
19961110 change: renamed qmail-pw2user as qmail-pw2u. tnx G2A.
19961105 change: set path in INSTALL.boot. tnx TJH.
19961105 change: noted in qmail-smtpd.8 that addresses without @ are
         always allowed through.
19961105 change: indicated at various spots in FAQ that rcpthosts has to
         be updated. suggested by various people.
19961105 change: indicated at various spots in FAQ that qmail has to be
         restarted. suggested by various people.
19961029 change: fixed typo in maildir2qmtp.1. tnx BG.
19961026 qmail 0.92, gamma.
19961026 bug: qmail-getpw did not 0-terminate usernames. tnx CF. impact:
         qmail-getpw would crash on some systems, deferring local
         deliveries. fix: 0-terminate.
19961025 cleanup: renamed auto-hassgprm.h to hassgprm.h.
19961025 cleanup: renamed auto-hassgact.h to hassgact.h.
19961024 change: replaced qmail-alias.0 with dot-qmail.0 in
         INSTALL.alias. tnx MW.
19961022 change: switched uids as early as possible in qmail-start.c.
19961022 change: in SECURITY, ``ten most recent sendmail security
         holes, five'' -> ``eleven most recent sendmail security holes,
         five.''
19961022 change: quote_need() now treats non-ASCII characters the same
         way as control characters.
19961022 change: added version and home page to qmail.7.
19961022 cleanup: introduced slurpclose.c. used it in qmail-alias.c,
         qmail-lspawn.c.
19961021 portability problem: AT&T NCR boxes need stdio.h before
         arpa/nameser.h. impact: dns.c would not compile. fix: include
         stdio.h. tnx HS.
19961021 change: added AIX section to INSTALL.ids. tnx SSB.
19961021 change: added qmail-pw2user.
19961020 change: added qmail-pw2user.8.
19961020 change: qmail-alias now dies soft on EACCES/EPERM for .qmail.
19961020 change: eliminated root comments from INSTALL.qsmhook.
19961020 change: various improvements in FAQ.
19961017 change: added QLX_ROOT.
19961017 change: renamed hosts in FAQ. tnx SLB.
19961017 change: in dot-qmail.5, documented envnoathost effects. tnx RN.
19961017 change: revamped addresses.5.
19961017 change: added stripvdomprepend() for better bounces. tnx PT.
19961012 portability problem: under HP-UX 9, can't setgroups() to 65537.
         impact: couldn't compile under HP-UX 9. fix: use 0 instead of
         65537 in chkshsgr.c. tnx HHO.
19961008 change: added several qlx codes.
19961008 cleanup: eliminated qlx from qmail-alias.
19961008 change: qmail-lspawn runs qmail-getpw as UID_PW.
19961008 change: added qmail-newuser.
19961008 change: added cdb support to qmail-lspawn.
19961008 change: integrated cdb.
19961007 change: added qmail-users.5.
19961007 change: eliminated usermap.
19961007 cleanup: switched execvp to execv in sendmail, qmail-lspawn.
19961007 change: used qmail-getpw in qmail-lspawn.
19961007 change: renamed LSPAWN_USERLEN as GETPW_USERLEN.
19961007 change: added qmail-getpw.
19961007 change: created users subdirectory of CONF_HOME.
19961007 change: fixed typo in FAQ. tnx J1B.
19961006 change: replaced subfdout with a small ss in qmail-alias.
19961006 change: reduced qmail-alias buffer sizes to 1024.
19961003 change: added note to maildir2smtp.0 about maildirmake. tnx SM.
19961003 bug: if ipme_init() returned -1, qmail-remote would continue,
         blindly assuming that all addresses are local. impact: on
         systems with too many aliases, all remote deliveries fail. tnx
         MD. fix: qmail-remote now dies with temp_oserr() on any result
         other than 1.
19961003 portability problem: all pre-4.9.4 versions of bind barf,
         badly, on CNAME queries to lame servers. what a crappy system.
         even if the resolver doesn't barf, the next name server down
         the line may barf. impact: qmail can't get mail through to
         domains that are (1) lame and (2) running old versions of bind.
         fix: never, ever, do a CNAME query. dns_cname() now does an ANY
         query instead. this, like sendmail's analogous procedure, is
         unreliable when a CNAME is mixed with other records.
19961001 cleanup: switched to libfd in qmail-start.c.
19960929 cleanup: renamed auto-hasmkffo.h to hasmkffo.h.
19960928 cleanup: reorganized qmail-start.c.
19960928 cleanup: used libfd in preline.c, qmail-lspawn.c,
         qmail-popup.c, qmail-rspawn.c, qmail-start.c, qqtalk.c,
         qsmhook.c.
19960928 cleanup: added libfd.
19960927 change: in SECURITY, ``nine most recent sendmail security
         holes, four'' -> ``ten most recent sendmail security holes,
         five.''
19960926 change: added tcpcontrol notes to FAQ.
19960926 change: qmail-smtpd now immediately closes connection, with a
         warning message dedicated to Solaris, if stray newlines show up
         in the incoming data.
19960926 change: added INSTALL.boot.
19960926 portability problem: on systems that can handle IP interface
         aliases (i.e., on sa_len systems), SIOCGIFADDR returns the
         primary address for an alias. impact: ipme_init() did not
         include alias addresses. fix: ipme_init() avoids SIOCGIFADDR on
         sa_len systems; on these systems, the address we want is
         already in ifr. tnx DM.
19960926 change: qmail-alias kills itself if locking takes longer than
         30 seconds.
19960926 change: qmail-pop3d no longer moves messages. tnx RS.
19960924 change: added note to FAQ about descriptors limit. tnx RD.
19960922 change: open_trunc() now uses 644.
19960922 change: qmail-setup now does umask(077).
19960922 change: maildir2mbox now does umask(077).
19960922 change: moved subfderr buf up to 64 characters.
19960920 change: in SECURITY, ``eight most recent sendmail security
         holes, three'' -> ``nine most recent sendmail security holes,
         four.''
19960920 portability problem: init run commands are subject to job
         control signals under more systems than HP-UX. impact: on some
         systems (e.g., Solaris), qmail daemons would be killed. fix:
         INSTALL now tells everybody to use csh -cf.
19960920 change: added queue-run section to FAQ.
19960920 change: in pine-crashing question in FAQ, added -oem and -oi,
         so that change will work with the real sendmail too.
19960919 change: added CNAME section to FAQ. tnx to various people.
19960919 change: eliminated QQX_EXECHARD and QQT_EXECHARD. this means
         that all qmail-queue invocation failures are now soft, even
         things like EPERM.
19960919 change: replaced ``No such address'' with ``Sorry, no mailbox
         here by that name.'' tnx G2A.
19960919 change: qmail-remote now includes host name in no-such-host
         messages. tnx G2A.
19960919 change: replaced ``Temporarily unable to canonicalize address''
         with ``CNAME lookup failed temporarily.''
19960918 change: improved an error message in qmail-alias.c. tnx TG.
19960918 change: added SHELL=/bin/sh to Makefile. tnx JL.
19960916 change: reorganized INSTALL.ids a bit.
19960916 change: ``from smtpd'' is now ``from network''.
19960916 change: SMTPD is now DAEMON.
19960916 change: qmail-start sets logger uid to UID_LOG. tnx JLH.
19960916 change: added CONF_USERL.
19960916 change: iaafmt() now puts a dot on in-addr.arpa.
19960915 change: added UPGRADE. suggested by several people.
19960915 change: added qsutil error messages to qmail-log.5.
19960915 change: qsutil error messages are now alerts.
19960915 portability problem: on some systems, logger appears to use
         syslog(pri,buf) instead of syslog(pri,"%s",buf). tnx JC.
         impact: logger could barf or crash if fed messages containing
         %. an attacker could easily cause a crash, eliminating qmail's
         logs. fix: % is no longer considered safe for logs.
19960912 cleanup: split seek.c into seek_*.c.
19960912 cleanup: replaced seek_to() with seek_set().
19960912 cleanup: introduced libseek.a.
19960907 cleanup: split case.c into case_*.c.
19960907 cleanup: introduced libcase.a.
19960907 cleanup: split wait.c into wait_*.c.
19960907 cleanup: introduced libwait.a.
19960907 cleanup: renamed auto-haswaitp.h to haswaitp.h.
19960907 cleanup: split open.c into open_*.c.
19960907 cleanup: introduced libopen.a.
19960904 change: added generic pointer to qmail-control.5. tnx HW.
19960904 change: rewrote rcpthosts section in FAQ. tnx HW.
19960904 change: added organization section to FAQ. tnx HW.
19960902 qmail 0.91, gamma.
19960902 change: control_readfile() can now handle partial lines. tnx
         JDHB.
19960902 change: eliminated non-fqdn note from FAQ. next version of
         tcpserver will use DNS directly.
19960902 change: qlist now uses NEWSENDER, not SENDER.
19960902 change: qmail-pop3d no longer obtains a lock. tnx RS.
19960902 change: put }g on all seds in Makefile.
19960831 change: noted in qmail-control.5 that comments are not allowed
         in control files. tnx J2B.
19960829 change: used double union in alloc.c. tnx ME.
19960829 change: replaced semicolon with colon for smtproutes port.
19960829 change: in INSTALL, put make man just before make setup.
19960829 change: changed a few qmail messages into alerts.
19960829 cleanup: renamed datetime_gmt as datetime_tai.
19960829 change: added note to UUCP question that some UUCP software
         doesn't want preline -f. tnx SB.
19960829 change: added question 2.4 to FAQ on SLIP/PPP.
19960828 change: replaced owner- with owner-@host-@[] in qmail-inject.
19690828 change: replaced owner- with owner-@host-@[] in qmail-alias.
19960828 change: replaced owner- with owner-@host-@[] in injectbounce().
19960828 change: replaced owner- with owner-@host-@[] in senderadd() for
         owner hack.
19960828 change: qmail-inject -n now prints Return-Path.
19960825 cleanup: revised ending code in token_addrlist(). 
19960825 change: tokenize now uses linelen 0 for unparse.
19960825 change: if linelen is 0 in token822_unparse, no length limit.
19960825 change: added LINELEN macro to qmail-inject for unparse.
19960825 change: token822_unparse now takes linelen argument. (leaving
         two spaces on the right before linelen.)
19960824 cleanup: renamed token as token822.
19960822 portability problem: under NEWS-OS, /bin/mail and /usr/ucb/mail
         invoke sendmail with -E and -J options. tnx TU. impact:
         couldn't send mail with those programs. fix: accept opts,
         including _optional_ args. ugh.
19960821 change: sendmail now quits if invoked as newaliases. tnx TU.
19960821 portability problem: under NEWS-OS, dirent.h needs sys/types.h.
         tnx TU. this POSIX violation also appears in some versions of
         FreeBSD. impact: couldn't compile under NEWS-OS. fix: include
         sys/types.h in direntry.h* and trydrent.c. [sigh]
19960821 change: added concurrencyremote question to FAQ.
19960821 change: added chkspawn.
19960821 change: moved default SPAWN_NUMD up to 120.
19960818 change: allowed ;port in smtproutes. tnx AL.
19960818 change: introduced port in qmail-remote.c.
19960818 change: qmail-queue records qp in Received lines. 2 lines of
         code. tnx ME.
19960818 change: in SECURITY, ``seven most recent sendmail security
         holes'' -> ``eight most recent sendmail security holes.''
19960818 change: qmail-pop3d now appends an extra blank line to every
         message, for compatibility with popper. some clients can't
         deal with the right thing, unfortunately. tnx FPL.
19960818 change: added qmail-tcpto.
19960818 change: eliminated cc -posix for NeXTs. tnx SA.
19960818 change: eliminated loadfifo. tnx SA.
19960818 change: integrated auto-configured fifo.c code from SA.
19960817 change: put SYSDEPS into a more reasonable order.
19960813 change: indicated possibility of duplication when qmail-remote
         gets a dead connection after DATA. tnx ME.
19960813 change: documented qmail-inject environment variables.
19960813 change: supported per-recipient owner hack in qmail-inject.
19960813 change: supported per-message owner hack in qmail-inject.
19960813 change: introduced hackedruser into qmail-inject.
19960813 change: introduced QMAILRUSER, QMAILRHOST.
19960812 change: added QMAILINJECT option to allow address-comment form.
19960812 change: made name-address form the default in qmail-inject.
19960812 change: added QMAILINJECT options f and m to delete From and
         Message-ID on input. tnx LL.
19960812 change: added QMAILINJECT environment variable.
19960812 change: added QMAILHOST, QMAILUSER, QMAILNAME to override
         MAILHOST, MAILUSER, MAILNAME. tnx MG.
19960812 change: added qmail-showctl.
19960812 portability problem: under Solaris 2.4 and possibly other
         systems, the linker does not give generic alignment to an array
         of 4096 chars. tnx JP. impact: some subset of the programs
         would (reliably) die with a bus error; in the Solaris case,
         maildir2mbox. fix: redefine space in alloc.c to be aligned.
19960812 change: qmail-remote no longer does CNAME lookups if there's an
         artificial SMTP route. tnx ME.
19960812 change: added flagcname arg to addrmangle() in qmail-remote.
19960812 cleanup: moved host/relayhost processing earlier in
         qmail-remote.
19960812 change: qmail-remote stops before DATA if no RCPTs were
         successful. tnx JLH.
19960812 change: rewrote rcpthosts explanation in FAQ.
19960811 change: added qmail-log.5.
19960811 change: introduced ALIAS_PATERNALISM. configurability requested
         by several people.
19960811 change: eliminated go-writability test for qmeox(). the alleged
         value of paternalism is nonexistent if nobody even notices
         you're doing it.
19960811 change: in qbiff, changed no-/-allowed to no-/-at-beginning,
         no-dots-allowed, must-be-nonempty. tnx MD.
19960811 change: in mbox.5, discouraged mail readers from looking for
         From_ lines only after blank lines. too much crap in the world.
19960811 change: added subject line to qreceipt success notices.
19960811 change: added subject line to qmail-send bounce messages.
19960811 change: qmail-alias now expects dash arg. this finally gives
         lspawn complete control over the local -> ~user/.qmail-ext map.
19960811 change: qmail-lspawn passes dash arg to qmail-alias.
19960811 change: reorganized qlist acknowledgment format. again.
19960811 change: documented EXT, EXT2, EXT3, EXT4. tnx BB.
19960810 change: qmail-makectl now copies locals to rcpthosts. should be
         a better default. suggested by TK.
19960805 portability problem: new makefile generator put in tabs again.
         sigh. impact: couldn't compile under some systems. fix: same as
         before. tnx TG.
19960804 change: added tcpserver instructions to FAQ.
19960804 change: reorganized FAQ server instructions into a new section.
19960801 qmail 0.90, gamma.
19960801 change: qmail-qmtpd now supports rcpthosts, RELAYCLIENT.
19960731 change: default NUMD is now 29. this prepares for weird systems
         where getpwnam() needs more than one descriptor (but the
         descriptor limit is still 64! ... you never know), and for
         possible future getpwnam() replacements.
19960731 change: popped subfderr buffer up to 32 characters. made sure
         that everybody flushed subfderr as necessary.
19960731 change: maildir2qmtp now prints filenames and responses.
19960731 change: maildir2smtp now prints filenames it's trying and
         relevant portion of SMTP responses.
19960731 change: used succwrite() in maildir2smtp, maildir2qmtp.
         simplifies code quite a bit.
19960731 change: qmail-remote's blast() checks sooner for write errors.
19960731 change: added better -e option to sendmail. tnx TG.
19960731 change: added maildir2qmtp.
19960730 cleanup: eliminated die_nomem() in maildir2smtp.c.
19960730 change: dns_cname now pretends that "foo." is a CNAME for "foo"
         to give the desired behavior for people who misuse DNS and
         violate RFC 822. tnx RN.
19960730 change: dns_cname now tests for empty names and ] on every
         loop.
19960730 change: used LSPAWN_BREAK in qmail-send.c for usermap.
19960730 change: updated header example in qmail-header.5.
19960730 change: added printbreak. auto-configured BREAK in dot-qmail.5,
         qmail-lspawn.7, qmail-send.8, qmail-upgrade.7, qlist2.
19960730 change: added printnumd. auto-configured NUMD in qmail-send.8,
         qmail-limits.8.
19960730 change: added printsplit. auto-configured split in qmail-upq.
19960730 change: added dot-qmail.5.
19960730 change: qmail-smtpd now treats HELO as including RSET.
19960730 change: added moreinfo to qlist usage message.
19960729 change: improved an error message in qmail-alias.
19960729 cleanup: merged qmeox(), qmeodx().
19960729 bug: failure to stat .qmail-owner was not an error. impact: if
         stat failed temporarily (e.g., because of NFS), .qmail-owner
         would be incorrectly ignored, so outgoing message would have
         wrong envelope sender. fix: qmail-alias does temp_nfsqmail() if
         stat() returns a temporary error.
19960729 change: added RFCOWNER.
19960729 change: added qmtpd setup question to FAQ.
19960729 change: added qmail-qmtpd.
19960728 change: revamped maildir2smtp error messages.
19960728 change: revamped maildirwatch error messages.
19960728 change: revamped maildir2mbox error messages.
19960728 change: used strerr in maildir_scan().
19960728 change: used strerr in maildir_chdir().
19960728 change: introduced strerr.
19960728 bug: the new tcp-env tried to read from an ndelay socket.
         impact: TCPREMOTEINFO would always be empty. fix: unset ndelay
         in remoteinfo.c.
19960728 bug: if maildir2smtp saw a permanent failure after MAIL, it
         failed to do RSET. impact: all further messages would be
         rejected at the MAIL stage. fix: maildir2smtp now always does
         RSET. tnx JW.
19960728 cleanup: qmail-alias now applies lowercase and dot-to-colon
         conversion directly to dashext, leaving everything else alone.
         this works since all .qmail access is factored through dashext.
19960727 portability problem: under NeXTStep, -posix is almost entirely
         broken. impact: qmail daemons would dump core under NeXTStep.
         fix: turn off -posix, except for loading qmail-setup, which
         needs mkfifo(); NeXT, bless them, didn't put mkfifo() into the
         C library where it belongs. this requires a new make command,
         namely loadfifo.
19960727 change: all characters 33-126 are now considered safe for logs.
         tnx MD.
19960727 cleanup: eliminated qp variable from mailforward().
19960727 cleanup: maildirwatch.c includes headerbody.h.
19960727 cleanup: eliminated match from maildirwatch.c.
19960727 cleanup: eliminated code variable from maildir2smtp.c:doit().
19960727 cleanup: maildir2smtp.c includes scan.h.
19960727 cleanup: maildir.c includes str.h.
19960727 cleanup: qmail-popup.c now includes exit.h.
19960727 cleanup: qmail-pop3d.c now includes exit.h.
19960727 cleanup: eliminated path from qmail-start.c.
19960727 cleanup: eliminated birthplusnn from nextretry().
19960727 cleanup: eliminated r from timeoutconn().
19960727 cleanup: tcpto.c now includes byte.h.
19960727 cleanup: spawn.c now declares initialize().
19960727 cleanup: qmail-lspawn.c now includes str.h, byte.h.
19960727 cleanup: qmail-inject.c now includes quote.h.
19960727 change: qmail-check now checks separately for group
         readability and other readability.
19960727 bug: maildir2smtp didn't check flagehlo in PIPELINING parsing.
         impact: a server that said PIPELINING at any point, not just
         EHLO, would receive pipelined data. fix: check flagehlo.
19960727 bug: readsubdir was calling pause(). impact: if a subdirectory
         was removed, qmail-send would hang. fix: use rs->pause().
19960727 change: used error_str in qmail-qread.
19960727 change: qmail-qread now looks for local/remote open errors.
19960727 cleanup: added warn() in qmail-qread.c.
19960727 change: qmail-qread now exits 111 for temporary errors.
19960727 change: used error_str in qmail-setup.
19960727 change: introduced error_str.
19960727 change: replaced qmail-check with make check in INSTALL.
19960727 change: added check target to Makefile.
19960727 change: replaced qmail-setup with make setup in INSTALL.
19960727 change: indirected fake targets through do- targets.
19960727 change: added setup target to Makefile.
19960727 change: qmail-makectl now makes sure that defaultdomain has
         at least one dot. e.g., enteract.com -> enteract.com, not com.
19960726 bug: quote() failed to quote commas. impact: addresses
         containing commas would not have been quoted correctly for
         Return-Path or for SMTP MAIL FROM. fix: quote commas.
19960726 change: sendmail now mentions qmail-qread, not qmail-mailq.
19960726 change: qmail-alias now expects ext arg. this eliminates
         LSPAWN_BREAK from qmail-alias and gives lspawn almost complete
         control over the local -> ~user/.qmail-ext transformation. the
         exception is that qmail-alias always uses ~user/.qmail,
         ignoring ext, if local is the same as user.
19960726 change: qmail-lspawn passes ext to qmail-alias.
19960726 change: alloc() now uses up a 4K space before calling malloc().
19960726 change: ipalloc allocation base is now 10. 100 was silly.
19960726 change: stralloc allocation base is now 30.
19960726 change: injectbounce() now supports the owner hack.
19960726 change: qmail-smtpd no longer requires HELO. tnx K1J.
19960726 cleanup: replaced makereceived() with dohelo().
19960726 change: qmail-smtpd is back to 555 for syntax errors.
19960725 change: qmail-alias now supports the owner hack. tnx to RN for
         prodding me to look at this problem.
19960725 change: senderadd() now supports the owner hack.
19960725 cleanup: split off senderadd().
19960725 change: added pine-crashing note to FAQ.
19960725 change: added procmail config.h note to INSTALL.mbox.
19960725 change: added elm TMPDIR note to INSTALL.mbox.
19960725 change: added pine.conf note to INSTALL.mbox.
19960724 change: added fixup note to FAQ.
19960724 change: qmail-inject now exits 111 for temporary errors.
19960724 change: qmail-smtpd now appends RELAYCLIENT to incoming
         recipient domain names.
19960724 cleanup: moved relayclient out of qmail-smtpd's addrallowed()
         into caller.
19960724 change: added rcpthosts wildcards.
19960724 change: added clean target to Makefile.
19960723 change: added virtualdomains exceptions.
19960722 change: added BLURB4.
19960722 change: added BLURB3.
19960722 change: eliminated smarthost and localnet.
19960722 change: incorporated relaymap, contributed by LW. renamed it
         as smtproutes.
19960722 change: qmail-popup now supports APOP. suggested by BG, who
         distributed similar changes.
19960722 change: qmail-popup now sends APOP timestamp to checkpassword.
19960722 cleanup: in qmail-popup, split off doanddie().
19960722 change: qmail-popup now prints APOP timestamp in banner.
19960722 change: added hostname argument to qmail-popup.
19960722 cleanup: in qmail-popup, split out() into out(), outflush().
19960722 cleanup: in qmail-popup, introduced pop3_greet().
19960721 portability problem: under Unisys SVR4, hostname is not in the
         usual path. impact: qmail-makectl fails. fix: added hostname
         command here, used it in qmail-makectl.
19960721 portability problem: on some sysctl-based systems, apparently
         gethostname() doesn't write anything if the output buffer is
         too small. it should write a truncated name. impact: if anyone
         has a hostname longer than 64 characters, maildirs could get up
         to 64 characters of garbage, rather than a truncated hostname.
         fix: qmail-alias now does *host = 0 before calling gethostname.
19960721 change: updated FAQ examples from qsmhook to preline.
19960721 change: added preline.
19960721 change: qsmhook now uses signal_init, signal_uninit.
19960721 change: qsmhook now checks specifically for empty args.
19960721 change: documented mbox.
19960721 change: added EXT, EXT2, EXT3, EXT4.
19960721 change: added LAST response to qmail-pop3d, always returning
         OK 0. tnx RN.
19960721 change: added qmail home page to README.
19960721 change: added HELP response to qmail-smtpd. tnx RN.
19960720 change: expanded, vertically, the qmail-inject error message
         for unparseable header fields.
19960720 change: logo is now dolphin. tnx CEJ.
19960719 qmail 0.76, beta.
19960719 change: used LSPAWN_BREAK in qmail-alias for deciding how to
         handle extensions. this should produce better behavior in the
         (unsupported) case that LSPAWN_BREAK is not a hyphen.
19960719 bug: qmail-smtpd didn't check for null arg on MAIL, RCPT.
         impact: qmail-smtpd would deref 0 and crash. fix: qmail-smtpd
         now gives syntax error on null arg.
19960719 change: documented UFLINE in qmail-command.8. tnx TG.
19960718 change: added maildir2smtp.
19960718 cleanup: introduced maildir.c. used it in maildir2mbox.c,
         maildirwatch.c.
19960718 change: added maildirwatch.
19960718 cleanup: maildir2mbox now sets up pq2 as it is deleting from
         pq, rather than simultaneously with pq.
19960718 change: added H_DELIVEREDTO.
19960718 portability problem: Unisys requires -lsocket -lnsl. impact:
         couldn't compile under Unisys. fix: added unix_sv section to
         make-cmds.sh. tnx TVP.
19960718 change: added unix_sv section in find-systype. tnx TVP.
19960717 change: qmail-alias now appends newline if .qmail does not end
         with a newline. tnx MC.
19960717 change: qmail-alias now defers delivery for a blank line only
         if it is the first line of the file. handles user behavior
         described by MC of putting many newlines at end of file.
19960717 bug: qmail-inject looked for dots in user part, not just host
         part, when deciding whether to use defaultdomain. impact: the
         address joe.bloggs@here didn't have defaultdomain added. fix:
         qmail-inject now stops at the @.
19960717 change: updated INSTALL.alias to mention qmsmac.
19960717 change: syntax error code for SMTP is now 501.
19960717 change: added -e option to sendmail. tnx TG.
19960716 change: changed ~alias files to .qmail-local, not .qmaillocal.
         suggested by many people.
19960716 change: redid qmail-alias/qmail-lspawn interface.
19960716 change: replaced EXTENSION, USEREXT with LOCAL.
19960716 change: qmail-queue now removes intd, mess upon error, as long
         as it doesn't time out. suggested by BB et al.
19960716 change: added flagmademess, flagmadeintd to qmail-queue.c.
19960716 cleanup: changed todofd to intdfd in qmail-queue.c.
19960716 cleanup: added cleanup() to qmail-queue.c.
19960716 change: added timeout to tcp-env.c, default 30 seconds.
19960716 change: remoteinfo_get() now uses timeoutconn().
19960715 change: added procmail config.h note to FAQ.
19960704 change: qmail-upgrade.7 now warns administrators that ~alias
         generally doesn't apply to addresses starting with a user name.
19960703 change: added echo \c note to FAQ. tnx PJG.
19960702 change: qmail-smtpd now accepts HELO without an argument.
         tnx K1J, J1B.
19960627 change: qmail-lspawn.8 now mentions that qmail-lspawn doesn't
         set up supplementary groups. tnx TG.
19960625 portability problem: under Linux, read(,,0) doesn't do proper
         error slippage. impact: timeoutconn() would always report
         success; if a connection failed, qmail-remote would report a
         greeting failure and skip all further MX records. tnx ME. fix:
         timeoutconn() now uses getpeername() to check for success.
19960625 change: qmail-smtpd now mentions disk full for QQT_WRITE.
19960625 change: qmail-inject now mentions disk full for QQT_WRITE.
19960622 change: if RELAYCLIENT is set, qmail-smtpd skips rcpthosts.
19960609 change: updated INSTALL for current SMTP responses.
19960607 change: clarified INSTALL.qsmhook examples. tnx S1R.
19960607 change: added subject parsing to qlist.c. tnx RN.
19960607 cleanup: used case_diffb in qlist.c.
19960607 change: added extra log information to INSTALL examples.
19960606 change: added -Pn to uucp line in FAQ. tnx DWS.
19960605 portability problem: under Solaris, /usr/bin/groups incorrectly
         reports your groups in /etc/group, rather than the results of
         getgroups(). tnx MD, PJG. impact: test #19 in INSTALL fails.
         fix: added special note to test #19 (sigh) about Solaris.
19960605 change: improved maildir setup commands in INSTALL.mbox.
19960605 change: on success, qmail-alias logs forwarding qp. 9 lines
         extra code.
19960605 change: qmail-send logs qp for bounce. 6 lines extra code.
19960605 change: qmail-smtpd includes qp in its response when it accepts
         a message. 7 lines extra code. requested by MD and others.
19960605 change: added qqtalk_qp.
19960605 change: qmail-send now logs uid and qp from todo file. 14 lines
         extra code.
19960605 change: qmail-queue now records uid and qp in u and p lines
         in todo file. 7 lines extra code.
19960605 change: improved qmail-alias x-bit error messages.
19960605 change: newline in log is now converted to /, not underscore.
19960604 change: when it accepts a message, qmail-smtpd includes the
         local time in its 250 response.
19960604 change: on success, qmail-alias prints delivery counts,
         file+forward+program.
19960603 change: qmail-remote now reports IP address on success. tnx MD.
19960603 change: qmail-send now logs success and failure reports, not
         just deferral reports.
19960603 change: added netbsd section in find-systype, same as bsd.os
         section. this will affect netbsd-* systypes. tnx MBS.
19960530 qmail 0.75, beta.
19960528 change: added qmail.7. tnx MD.
19960525 change: added qmail-pop3d. tnx RN.
19960525 change: added qmail-popup. tnx RN.
19960525 change: added elm filter section to FAQ. tnx GB.
19960502 portability problem: on many systems, select() on an
         almost-full pipe incorrectly says writable. tnx ME for running
         into this and helping track it down. impact: if qmail-send
         writes a pipeful to qmail-lspawn or qmail-rspawn before they
         can react (because of high concurrency, high load, or long
         addresses), it will receive an incorrect -1/EAGAIN, and will
         conclude that spawn died. sysadmin will have to restart qmail,
         and messages will be duplicated. fix: in qmail-send.c,
         busy-loop if write() to spawn returns any error other than
         EPIPE.
19960501 bug: qmail-alias treated NAMETOOLONG and NOTDIR as temporary
         errors. impact: qmail-alias never looked for -default; even if
         mail was destined to bounce, it would have to time out first.
         fix: qmail-alias now uses error_temp().
19960430 bug: qmail-smtpd treated qq crash as permanent error. impact:
         if somebody actively kills qq, mail will be incorrectly
         bounced. tnx SS. fix: qmail-smtpd now treats only TOOLONG and
         EXECHARD as permanent errors.
19960430 cleanup: eliminated QQT_TTY from qqtalk.h.
19960428 change: added ``warning: '' before trouble-marking message.
19960428 change: added percenthack. requested by GB.
19960428 cleanup: switched to auto-generated Makefile.
19960428 cleanup: switched to auto-generated .o dependencies.
19960428 cleanup: eliminated fmt.o, scan.o from Makefile.
19960428 portability problem: under HP-UX 10, the rc pgrp is sent HUP
         when rc finishes. tnx BG. impact: the qmail daemons are killed
         when rc finishes. fix: added special note in INSTALL (sigh) to
         use csh -cf.
19960427 cleanup: added PORT_SMTP in qmail-remote.c.
19960427 cleanup: introduced timeoutwrite.c. used it in qmail-remote.c.
19960427 cleanup: introduced timeoutread.c. used it in qmail-remote.c.
19960427 cleanup: introduced timeoutconn.c. used it in qmail-remote.c.
19960427 change: added timeoutconnect. default: 60 seconds.
19960427 change: added pop3d instructions to FAQ. tnx RN.
19960427 change: eliminated env manipulation from qmail-start. tnx BG.
19960427 change: headerbody now ends header, inserting blank line, if
         first line of a header field doesn't pass hfield_valid. tnx TG.
19960427 change: headerbody now prepends MBOX-Line: to any header line
         starting From_. this lets qmail-inject work with elm's bounce.
         tnx OR, K1J, et al.
19960426 change: added moreinfo arg to qlist and qlist2.
19960426 change: added signal_uncatchchild() to qmail-send.c. tnx BG.
         now, if sysadmin sets SIGCHLD to SIG_IGN before invoking
         qmail-send [sigh], qmail-send won't screw up bounce messages.
19960426 change: dns_cname now checks whether last character is ],
         rather than whether first character is [, for quick return.
19960426 cleanup: glue is now global in dns.c.
19960426 cleanup: qmail-remote no longer does stralloc_0 for host and
         canonhost.
19960426 change: dns_mxip no longer rejects [foo].bar.
19960426 change: dns_mxip no longer requires for bracket that input
         be 0-terminated.
19960426 change: qmail-start can now take logger as an argument.
19960426 change: qmail-start now invokes qmail-send in foreground (as
         parent of other processes).
19960426 change: added mailsubj. tnx GAW.
19960426 portability problem: under some systems, can't lock read-only
         file. impact: maildir2mbox would always fail on those systems.
         fix: maildir2mbox now opens a separate lock fd. tnx BG.
19960426 cleanup: removed unnecessary #!/bin/sh and # AUTO from mctl.sh.
19960426 change: added qmail-qstat.
19960426 change: added qmail-qread.8.
19960426 change: renamed qmail-mailq as qmail-qread.
19960419 change: qmail-alias now defers delivery rather than skipping
         blank lines in .qmail.
19960419 change: in qmail-lspawn.c, lowercased name before getpwnam().
         really getpwnam() should do this, but oh well.
19960419 change: added username to qmail-lspawn.c, with LSPAWN_USERLEN
         in conf-unusual.h. names longer than LSPAWN_USERLEN will skip
         getpwnam().
19960419 change: if qlist doesn't see any cmds, it presumes that you
         meant to subscribe.
19960419 change: reorganized qlist acknowledgment format.
19960415 change: reorganized and rewrote FAQ.
19960415 change: renamed HOWTO as FAQ.
19960414 change: in qmail-alias, converted extension to lowercase just
         before qmeopen(), qmeox() calls. thus EXTENSION and USEREXT and
         RECIPIENT will preserve case passed by qmail-lspawn, while
         .qmailext lookups will not.
19960414 change: removed case_lowers(r) from qmail-lspawn.c. tnx JLH.
19960414 change: moved extension . -> : conversion to just before
         qmeopen(), qmeox() calls in qmail-alias.c. thus EXTENSION and
         USEREXT and RECIPIENT will preserve dots.
19960414 change: qsmhook -x now does case-independent comparison.
19960413 change: added procmail instructions to HOWTO.
19960409 bug: qmail-alias does not check for newlines when it generates
         Return-Path. impact: resulting Return-Path header field will be
         illegal, if sender address contains newline followed by
         something other than whitespace. fix: qmail-alias now replaces
         newline with underscore in rpline.
19960409 change: added leaf UUCP description to HOWTO. tnx J2K.
19960409 change: added -B option to sendmail. tnx OR.
19960409 change: qlist now makes lists unwritable (after renaming from
         .qtemp to .qmail). tnx MLH.
19960409 change: added flagdtline to qsmhook.c, based on -l option.
19960409 change: added PIPELINING declaration to qmail-smtpd. tnx JGM.
19960409 change: qmail-smtpd now flushes output instantly after DATA,
         QUIT, HELO, EHLO, NOOP, VRFY, or any 502.
19960409 change: qmail-smtpd now flushes output upon read() and death.
19960409 change: qmail-smtpd no longer flushes output in out().
19960409 change: increased qmail-smtpd outbuf size from 128 to 512.
19960409 cleanup: in qmail-smtpd, eliminated ssinit() in favor of FDBUF.
19960409 bug: qmail-alias produced aliasfoo-owner rather than foo-owner
         as envelope sender for ~alias/.qmailfoo. tnx DS. impact: wrong
         envelope sender whenever ~alias/.qmailfoo-owner existed. fix:
         qmail-alias now checks for hyphen at beginning of extension.
19960409 change: added _ESMTP to end of 220. tnx JLH.
19960409 change: moved out("\r\n") out of smtp_greet() into callers.
         this improves the flushing behavior on 221.
19960328 qmail 0.74, beta.
19960326 change: changed subdirectory split from 32 to 23.
19960326 portability problem: some versions of make don't understand
         that a line with just a tab is blank. impact: couldn't compile
         under those systems. fix: eliminated extra tab from Makefile.
         tnx TG.
19960325 change: added qmail-mailq.
19960325 change: introduced readsubdir.
19960325 change: qmail-setup makes split; qmail-check checks split.
19960325 change: used split in qmail-send, qmail-clean, qmail-queue
         for mess, info, local, remote.
19960325 change: fmtqfn now supports split queue subdirectories.
19960325 cleanup: eliminated cat2s().
19960325 cleanup: introduced fmtqfn.c. used it in qmail-queue.c,
         qmail-send.c, qmail-clean.c.
19960325 change: in protocol between qmail-clean and qmail-send, now
         using intd/ instead of mess/.
19960325 change: qmail-queue.c and triggerpull.c now work inside queue
         subdirectory.
19960325 change: spawn.c now checks whether message is a regular file.
19960325 change: spawn.c now allows slashes in messid except at
         beginning.
19960325 cleanup: introduced fnmake_split in qmail-send.c.
19960325 cleanup: eliminated strnum in qmail-send.c in favor of
         fnmake_{info,todo,mess,chanaddr} and fnmake2_bounce.
19960325 cleanup: introduced strnum3 in qmail-send.c for the logging
         uses of strnum.
19960325 cleanup: in qmail-send.c, getinfo() now takes id argument.
19960325 cleanup: qmail-send.c now preallocates space for fn, fn2.
19960325 change: time zone is now -0000 instead of +0000. encouraging
         DRUMS to use this as an i-don't-know-the-local-time indicator.
19960324 change: qmail-rspawn.c now calls tcpto_clean().
19960324 cleanup: spawn.c now calls initialize().
19960324 change: qmail-setup makes lock/tcpto; qmail-check checks it.
19960324 change: qmail-remote now quickly skips connect() to a host that
         seems to be down. tnx BP for pressuring me to get this done.
19960323 change: in qmail-alias.8, renamed mboxg as mboxrd. tnx RD.
         idea was popularized by RD in June 1995.
19960322 cleanup: eliminated subfd_init().
19960322 change: qbiff now removes the word Subject.
19960322 change: now /bin/true instead of /dev/null in the generic
         INSTALL.ids instructions. tnx JPR.
19960322 change: added hfield_skipname(). tnx RN.
19960322 bug: qmail-inject did not check whether USER needed quoting.
         impact: if USER had weird characters, the From address would
         generally be wrong, unless the user manually set up MAILUSER
         with proper quoting. fix: qmail-inject sets up a quoted-string
         if necessary.
19960322 cleanup: separated out quote_need() in quote.c.
19960322 cleanup: added stralloc_catb.c. used it in qmail-alias.c,
         qmail-send.c.
19960322 change: qmail-send now uses a quadratic retry schedule from
         birth of each message. this also eliminates clustering.
19960322 cleanup: separated out nextretry() in qmail-send.c.
19960322 change: qmail-remote now passes all non-@ addresses through
         without comment, not just <> and <#>.
19960322 change: replaced # test with anything@[] test in qmail-inject.
19960322 change: replaced # with #@[] in qlist.c, qmail-alias.c,
         qmail-send.c, qreceipt.c.
19960322 change: qmail-lspawn no longer discards messages to <#>.
19960322 cleanup: in qlist, used str_diff for <> and <#> tests.
19960322 change: qmail-alias is now back to testing envelope sender for
         <> and <#>, rather than things without an @.
19960321 change: added 8BITMIME support to qmail-smtpd.
19960321 change: added ESMTP support to qmail-smtpd.
19960318 change: used NEWSENDER in place of SENDER for |forward.
19960318 change: added NEWSENDER.
19960318 change: added HCMSSC support to qmail-alias.c.
19960318 change: added HCMSSC support to spawn.c.
19960318 change: added HCMSSC support to qmail-remote.c.
19960318 change: added HCMSSC support to qmail-smtpd.c.
19960317 portability problem: SCO requires -lsocket -lnsl. impact:
         couldn't compile under SCO. fix: added SCO section in
         make-cmds.sh. tnx JPR. note that this is for OSR 5; 3.2v4.2
         will need more fixes, and old 3.2 is basically hopeless.
19960317 bug: newfield_datemake would leave newfield_date alone if it
         was already initialized, even though qmail-send calls
         newfield_datemake anew for each bounce. impact: bounce messages
         would usually have an incorrect Date field. fix: redid
         newfield_datemake to update newfield_date each time.
19960317 change: allowed . and @ in 822 phrases; 822 doesn't allow them,
         but they do show up. tnx to the DRUMS group.
19960317 change: replaced GMT with +0000 in date822fmt.c. this confuses
         a few versions of getdate(), but the DRUMS group is going to
         outlaw GMT, not just recommend against it as in 1123.
19960317 change: redefined ALIAS_EMPTY to take advantage of . for file
         deliveries. tnx RN.
19960317 change: qmail-alias now allows . as well as / to start file
         deliveries. tnx RN.
19960317 change: qmail-alias now dies (soft) if .qmail is writable to
         others, rather than silently ignoring it.
19960317 change: qmail-alias now dies (soft) if flagforwardonly is
         violated, rather than silently ignoring the bad instructions.
19960317 change: qmail-alias now ignores x bit on empty .qmail files.
19960317 bug: if RCPT gave 4xx and DATA gave 5xx, qmail-rspawn would
         incorrectly assign a permanent failure to that recipient.
         impact: in that case, mail would be incorrectly bounced. fix:
         remove orr > 0 test from qmail-rspawn.c.
19960310 change: tcp-env now uses signal_uninit(). [sigh]
19960310 change: tcp-env now specifically unsets HOST and INFO if they
         are not applicable. just trying to make it more widely usable.
19960310 cleanup: used byte_* in remoteinfo.c, ipme.c, tcp-env.c.
19960310 cleanup: added readwrite.h, eliminated sys.h.
19960310 cleanup: included byte.h in qmail-send.c.
19960310 cleanup: eliminated i and j from forward.c's main().
19960310 cleanup: eliminated wstat from qlist.c.
19960310 cleanup: eliminated die_nomem() parameter in qmail-setup.c.
19960310 cleanup: eliminated i from qmail-remote's addrmangle().
19960310 cleanup: added exit.h.
19960310 cleanup: split ipalloc.c off of ip.c.
19960310 cleanup: added fmt_strn.c, eliminated fmt_strncpy.c.
19960310 change: reorganized INSTALL to do some pre-upgrade tests.
         tnx RN.
19960310 change: reordered steps in upgrade procedure in INSTALL.
19960308 change: eliminated ownership test in qmail-alias.c. tnx DS.
19960304 change: in SECURITY, ``six most recent sendmail security
         holes'' -> ``seven most recent sendmail security holes.''
19960303 qmail 0.73, beta.
19960303 change: added SYSDEPS.
19960303 cleanup: revamped select.h autoconfiguration.
19960303 cleanup: revamped fork.h autoconfiguration.
19960303 cleanup: revamped direntry.h autoconfiguration. target is now
         direntry.h; auto-hasdrent.h is gone.
19960303 change: tryflock.c now includes <sys/types.h>, for consistency
         with lock.c. may affect portability.
19960302 portability problem: under BSDI, can't set sticky on normal
         files. dorks. impact: the new qlist doesn't work under BSDI;
         be glad I test things before release. fix: qmail-alias and
         qlist now use executable instead of sticky.
19960302 change: gfrom now quotes >From and >>From etc. as well as From;
         in other words, I'm switching from mbox format to mboxg format.
19960302 cleanup: added gfrom.c. used it in qmail-alias.c, maildir2mbox.c.
19960302 change: addbounce() now substitutes \n\n -> \n/ in reports,
         and \n -> _ in recips. thus bounces can now be reliably parsed.
19960302 change: if qmail-send had trouble reading the original message
         or the list of addresses for a bounce, it used to give up and
         send a bounce with "Oh no! I had trouble reading the rest of
         your message" or some such. now it aborts the bounce attempt
         and tries again later.
19960302 cleanup: added qqtalk_fail(). used it in qmail-alias.c,
         qmail-smtpd.c.
19960302 bug: if mailforward() had trouble reading message (e.g.,
         because of an I/O error), it marked an error but kept reading.
         impact: could loop forever. fix: upon error, break.
19960302 change: maildir2mbox now scans (restrictively) for return-path.
19960302 change: qbiff now prints subject and body, up to 74 chars.
19960302 change: added H_SUBJECT to hfield.
19960302 change: qbiff now puts TO before FROM.
19960301 cleanup: added fmt_str.c. used it in many places.
19960301 change: qmail-send now says something if you've told it to exit
         but it's waiting for some deliveries. tnx RN.
19960301 change: qmail-alias -n now continues (with warning) if home
         directory is sticky. tnx RN.
19960301 change: improved usage messages in qmail-alias.c. tnx RN.
19960301 change: put limit on length of addresses in qlist.
19960301 change: added exit 99 support to qmail-alias. tnx RN.
19960301 change: qmail-alias now exits immediately on temporary or
         permanent error. rewrote section in qmail-alias.8 accordingly.
19960301 cleanup: eliminated flagsuccesses from qmail-alias.c.
19960301 change: added usermap.
19960301 bug: failure to append to mbox was a permanent error. impact:
         if mbox was temporarily unopenable (e.g., because fds were
         low), mail would be incorrectly bounced. fix: failure is now
         temporary. tnx DS.
19960229 change: qmail-alias now preserves any envelope sender that
         doesn't contain an @, not just <> and <#>.
19960229 cleanup: revamped byte_* interface.
19960229 cleanup: renamed str_cpy as str_copy.
19960229 cleanup: added str_chr.c. used it in qbiff.c, qmail-smtpd.c.
19960229 cleanup: added str_rchr.c. used it in qmail-send.c, quote.c,
         qmail-remote.c.
19960229 cleanup: added byte_rchr.c. used it in qmail-smtpd.c, spawn.c.
19960229 cleanup: used USEREXT instead of RECIPIENT in qsmhook.c.
19960229 cleanup: used USEREXT instead of RECIPIENT in qbiff.c.
19960229 cleanup: removed j and k from rewrite() in qmail-send.c.
19960229 portability problem: under HP-UX 10 and Solaris 2.5, can't
         setgroups()/setgid() to the system's nogroup/nobody gid. dorks.
         impact: inetd chokes, so all SMTP connections are rejected; and
         ``alias'' mail, including postmaster, bounces. fix: in
         INSTALL.ids, set up a separate powerless gid (tentatively
         ``nofiles'') for qmaild and alias. tnx DS and PJG.
19960229 change: qreceipt now uses qqtalk rather than qmail-inject.
19960229 change: qlist now uses qqtalk rather than qmail-inject.
19960229 change: incorporated qmail-setup patch from RN for better
         error messages.
19960228 change: added LSPAWN_BREAK in conf-unusual.h; used it in
         lspawn.c. configurability requested by PJG.
19960228 portability problem: on several systems, including everything
         from DEC, select() on a pipe reader returns 1 if there aren't
         any writers yet. pointed out by DS. impact: qmail-send chewed
         up lots of CPU time. fix: trigger_set() now opens the pipe for
         writing after opening it for reading. also added trynpbg1; on
         working systems, no point in wasting the extra fd.
19960228 change: qmail-alias uses .qmail sticky bit for forwardonly.
19960228 change: qlist now sets sticky bit on .qmail file.
19960228 change: un-documented +list.
19960228 portability problem: on HP-UX and possibly other systems, the
         supplementary group list does not include the gid. pointed out
         by DS. impact: on those systems, tryshsgr could incorrectly set
         hasshsgr; this would prevent qmail-send from running. fix: if
         tryshsgr sees that getgroups() returns 0, now it actively sets
         up a supplementary group list. added chkshsgr to make sure the
         setgroups() will work.
19960227 cleanup: eliminated GETSHORT in dns.c in favor of getshort().
19960227 cleanup: deleted h->len < 3 test from qlist.c:dobody. tnx RN.
19960227 change: replaced ~ with $HOME in INSTALL.mbox.
19960227 change: added note about setgid-mail bits to INSTALL.mbox.
19960227 change: added forward.1.
19960227 change: modified forward to allow multiple addresses.
19960227 change: modified forward to take an entire address, not just a
         hostname.
19960227 change: renamed qrelay as forward.
19960227 change: added USEREXT support to qmail-alias.
19960227 change: added -F to sendmail. the need for this was pointed
         out by RN.
19960227 change: added 2 bytes of slop in alloc().
19960227 bug: received_setup() was not allowing space for the final \0.
         impact: none; the line length is always between 65 and 75
         characters, which gives at least 45 characters of slop with
         existing malloc() implementations. fix: leave space. tnx NH.
         note that the bug here is really in fmt_strncpy, which was
         written before i was truly free of the curse of libc.a.
19960227 change: added ALIAS_EMPTY in conf-unusual.h; used it in
         qmail-alias.c. tnx PJG.
19960227 change: added SPAWN_NUMD in conf-unusual.h; used it in spawn.c.
19960227 change: added conf-unusual.h.
19960227 cleanup: replaced sizeof(short) with 2 in dns.c.
19960227 portability problem: on an Alpha, long is 64 bits. pointed out
         by DS. impact: address lookups produced incorrect results on an
         Alpha; qmail-makectl and qmail-remote failed. fix: replaced
         sizeof(long) with 4 in dns.c.
19960227 portability problem: on an Alpha, bzero() is declared properly
         via sys/time.h. impact: couldn't compile on an Alpha. fix:
         removed bzero() declaration from select.h. tnx DS.
19960227 portability problem: under SCO, sys/file.h is not protected.
         impact: couldn't compile under SCO. fix: include sys/types.h in
         lock.c. tnx RN.
19960219 change: added some .qmail-list hints to qlist.1.
19960219 change: added +list support to qmail-alias.
19960215 change: added THANKS.
19960212 bug: foo was not initialized in qrelay.c. impact: depends on
         the machine; on some machines, no effect; on other machines,
         guaranteed core dump. fix: initialized foo. tnx DS.
19960209 qmail 0.72, beta.
19960209 change: qmail-alias now replaces dot, not slash, with colon.
         also, qmeopen() makes sure that .qmail file is S_IFREG; I hope
         this doesn't cause portability problems.
19960209 change: added success-reporting procedure to INSTALL.
19960208 change: added VERSION.
19960208 change: added qlist2.
19960208 change: revamped qlist interface. tnx RN.
19960208 change: improved an error message in qlist.c.
19960208 change: added qrelay. added relay section to HOWTO. tnx DS.
19960208 cleanup: included substdio.h in qqtalk.h.
19960207 bug: prioq_delmin() wasn't guaranteeing heap structure on the
         last element. impact: scheduled passes could have been delayed,
         conceivably as long as half an hour. fix: prioq_delmin() now
         checks when it can safely move the last element.
19960207 change: added maildirmake.1, maildir2mbox.1.
19960206 change: revised logo paragraph in THOUGHTS.
19960206 change: replaced nowhere.org with nowhere.mil in examples.
         nowhere.org is a real domain... [sigh]
19960206 change: added qreceipt.1.
19960206 portability problem: IRIX doesn't have vfork. pointed out by
         DS. impact: couldn't compile under IRIX. fix: added fork.h,
         tryvfork.c.
19960206 portability problem: IRIX doesn't have ranlib. pointed out by
         DS. impact: couldn't compile under IRIX. fix: added IRIX
         section in make-cmds.sh.
19960205 cleanup: removed warning from substdio_copy() documentation; in
         fact, substdio_copy() can be used safely on a fed substdio.
19960205 change: added qbiff.1.
19960204 change: implemented localnet. removed relevant paragraph from
         THOUGHTS. tnx IS.
19960204 change: in qmail-remote.8, explained the dangers of smarthost.
         tnx IS.
19960204 change: implemented virtualdomains wildcards. tnx JLH.
19960203 change: qmail-send now handles virtualdomains _after_ locals.
         updated INSTALL.qsmhook appropriately.
19960203 change: added note to INSTALL.alias about ~ftp, ~www, ~uucp
         being owned by root.
19960130 cleanup: in qlist.c, renamed flagremoved as flagwasthere.
19960130 bug: qmail-send did not pay attention to flagexitasap in
         pass_dochan(). impact: qmail-send would happily start new
         deliveries even if it wanted to exit. fix: qmail-send now
         returns immediately in pass_selprep() and pass_dochan() if
         flagexitasap.
19960130 change: in qlist.c and qlist.1, renamed ext as list.
19960130 change: in qlist.c and qlist.1, renamed manager as owner.
19960129 qmail 0.71, beta.
19960129 change: mentioned djb-qmailbeta in README. tnx MWE.
19960129 change: added a note to INSTALL.mbox making clear that
         Mailbox is in mbox format. tnx MWE.
19960129 change: qlist now warns you if it didn't see any cmds. tnx RN.
19960129 change: incorporated qlist patch from RN to refuse double subs. 
19960129 change: added qlist.1, contributed by RN. mangled it a bit.
19960129 bug: comment was not allowed in ``phrase (comment) <route>'';
         pointed out by RN. impact: some correct address lists could be
         mis-parsed by qmail-inject or qlist. fix: token.c now allows
         TOKEN_COMMENT in the appropriate scan.
19960128 change: added a logo paragraph to THOUGHTS.
19960127 change: implemented rcpthosts.
19960127 change: split up some uses of putflush in qmail-remote,
         qmail-smtpd, spawn.c. eliminated NODELAY and corresponding
         paragraph in THOUGHTS.
19960127 change: added quote2(). used it in qmail-alias, qmail-send,
         qreceipt. now addresses are properly quoted in the From, To,
         and internal Return-Path of bounces; the From and To of
         receipts; and the Return-Path/RPLINE of delivered messages.
         removed relevant paragraph from THOUGHTS.
19960127 change: in RFCLOOPS, documented fact that Delivered-To address
         is conventionally not quoted.
19960127 change: knocked default SMTP timeouts down to 20 minutes.
19960127 change: added INSTALL.ids. tnx RN.
19960127 change: in INSTALL, noted that nogroup should already exist.
19960127 bug: pass_selprep checked pqchan[c] even if pass[c].id. impact:
         qmail-send wasted CPU time whenever more than one message was
         waiting on a blocked channel. fix: pass_selprep now checks
         !pass[c].id.
19960127 bug: programs invoked from qmail-alias were immune to SIGPIPE.
         impact: a delivery pipeline such as |yes|head -1000 would loop
         forever, since yes does not check for write errors. fix: added
         signal_uninit(). used it before execvp in qmail-alias. [sigh]
19960127 cleanup: added date822fmt.c. used it in newfield.c, qmail-queue.
19960127 cleanup: added fmt_uint0.c. used it in myctime.c, newfield.c,
         qmail-queue.
19960127 cleanup: added dnsdoe.c. used it in dnscname, dnsfq, dnsip,
         dnsmxip, dnsptr.
19960127 cleanup: eliminated temp from dnsfq.c.
19960127 bug: gen_allocdefs was making assumptions incompatible with the
         alloc_re interface. impact: qmail-send would dump core if you
         ran out of memory. fix: changed alloc_re interface.
19960126 portability problem: some versions of Linux don't have
         net/route.h. pointed out by RN. impact: couldn't compile under
         those versions. fix: ipme.c no longer includes net/route.h;
         hopefully this won't cause new portability problems.
19960126 change: added chmod instructions to INSTALL and INSTALL.alias.
         tnx RN.
19960126 change: INSTALL now refers to the traditional sendmail spot
         (/usr/lib), not the BSD 4.4 spot (/usr/sbin). tnx RN.
19960126 change: make auto-uids.h now creates auto-uids.h.tmp first.
         thus, if someone disobeys the installation instructions, and
         his make fails to remove targets upon error, he'll still be
         okay. tnx RN.
19960126 change: added forgeries.7.
19960125 cleanup: eliminated flagverbose, flagmetoo in sendmail.
19960125 cleanup: added substdio_copy.c. used it at several spots.
19960125 cleanup: added constmap.c. qmail-send now uses constmap for
         locals and virtualdomains. this will speed things up: no
         problem now to have thousands of virtual domains. removed
         relevant paragraph from THOUGHTS.
19960125 change: added linux section in find-systype. this will affect
         linux-* systypes. tnx RN for relevant info.
19960124 change: added -od, -oe, -p, -f to sendmail. the need for
         these was pointed out by TN.
19960124 bug: qmail-smtpd was reading from descriptor 1. impact: none;
         in normal use, both 0 and 1 point to the network. fix: changed
         1 to 0.
19960124 bug: qmail-alias treated any .qmail open failure as permanent.
         impact: if a .qmail file was temporarily unopenable (e.g.,
         because of NFS), it was incorrectly ignored. fix: qmail-alias
         now dies QLX_SOFT on any open failure other than ENOENT.
19960124 change: added freebsd section in find-systype, same as bsd.os
         section. this will affect freebsd-* systypes.
19960124 cleanup: find-systype now immediately converts sys to lowercase.
19960124 change: qmail-setup now copies man pages into /var/qmail/man;
         qmail-check checks /var/qmail/man. using .0 style, which might
         cause trouble on various machines, but better than not trying.
19960124 change: in qmail-remote.c, changed perm_control to temp_control
         (and D to Z, thanks); thus failure to read control files (e.g.,
         because of permissions) is now a temporary error.
19960124 bug: in qmail-remote.c, temp_chdir() used D, not Z. impact: if
         chdir() to CONF_HOME failed (e.g., because of NFS), message
         would be bounced. fix: changed D to Z.
19960124 change: reorganized README.
19960124 portability problem: Linux has the fifo kernel bug that I had
         hoped I'd never run into. impact: messages under Linux (and any
         other systems with this bug) were picked up only in sweeps, not
         instantly. fix: triggerpull.c now writes a byte (non-blocking)
         to the fifo. updated INTERNALS accordingly.
19960124 bug: in qmail-remote.c, if quit() saw a remote write error, it
         would call writeerr() even though a message report had already
         been produced. impact: the mess report would include an extra
         ``ZConnected but communications failed,'' which was confusing
         to humans. fix: quit() now simply skips the wait-for-QUIT
         smtpcode() upon write error.
19960124 portability problem: Linux does not have SIGSYS or SIGEMT.
         impact: couldn't compile under Linux. fix: added appropriate
         ifdefs in signal.c.
19960124 qmail 0.70, beta.