regress/: Replace PF_ with AF_

[adns] / regress / case-longlab1.sys

adnstest default
:1 1/hyrndrobwlxxxxxxxxxxlllantysiliogogllanfairpwllgwyngyllgogerychw.relativity.greenend.org.uk.
 start 951955261.286712
 socket domain=AF_INET type=SOCK_DGRAM
 socket=4
 +0.000128
 fcntl fd=4 cmd=F_GETFL
 fcntl=~O_NONBLOCK&...
 +0.000053
 fcntl fd=4 cmd=F_SETFL O_NONBLOCK|...
 fcntl=OK
 +0.000033
 close fd=4
 close=OK
 +0.000238