.\"
.\" This file is part of Trivial IP Encryption (TrIPE).
.\"
-.\" TrIPE is free software; you can redistribute it and/or modify
-.\" it under the terms of the GNU General Public License as published by
-.\" the Free Software Foundation; either version 2 of the License, or
-.\" (at your option) any later version.
+.\" TrIPE is free software: you can redistribute it and/or modify it under
+.\" the terms of the GNU General Public License as published by the Free
+.\" Software Foundation; either version 3 of the License, or (at your
+.\" option) any later version.
.\"
-.\" TrIPE is distributed in the hope that it will be useful,
-.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
-.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-.\" GNU General Public License for more details.
+.\" TrIPE is distributed in the hope that it will be useful, but WITHOUT
+.\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+.\" FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+.\" for more details.
.\"
.\" You should have received a copy of the GNU General Public License
-.\" along with TrIPE; if not, write to the Free Software Foundation,
-.\" Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+.\" along with TrIPE. If not, see <https://www.gnu.org/licenses/>.
.
.\"--------------------------------------------------------------------------
.so ../common/defs.man \" @@@PRE@@@
.SH "SYNOPSIS"
.
.B pathmtu
+.RB [ \-46v ]
.RB [ \-H
.IR header ]
.RB [ \-m
Writes a brief description of the command-line options available to
standard output and exits with status 0.
.TP
-.B "\-v, \-\-version"
+.B "\-V, \-\-version"
Writes tripe's version number to standard output and exits with status
0.
.TP
.B "\-u, \-\-usage"
Writes a brief usage summary to standard output and exits with status 0.
.TP
+.B "\-4"
+Look up hostnames only as IPv4 addresses.
+.TP
+.B "\-6"
+Look up hostnames only as IPv6 addresses.
+.TP
.BI "\-g, \-\-growth=" factor
Sets the retransmit interval growth factor. Each time a packet is
retransmitted,
.I did
receive the packet. The default timeout is 8 seconds.
.TP
+.B "\-v, \-\-verbose"
+Write a running human-readable commentary to standard error about the
+progress of the operation. Usually,
+.B pathmtu
+does its job silently unless there are errors.
+.TP
.BI "\-H, \-\-header=" header
Sets the packet header, in hexadecimal. If you set an explicit port
number, it may be worth setting the packet header too, so as not to