Recover application ability to supply fabricated PID
embedded into ident that was lost when libc switched
to generation of RFC 5424 log messages, for example:
logger -t "ident[$$]" -p user.notice "test"
It is essential for long running scripts.
Also, this change unbreaks matching resulted entries
by ident in syslog.conf:
!ident
*.* /var/log/ident.log
Without the fix, the log (and matching) was broken:
Aug 1 07:36:58 hostname ident[123][86483]: test
Now it works as expected and worked before breakage:
Aug 1 07:39:40 hostname ident[123]: test
Differential: https://reviews.freebsd.org/D36005
MFC after: 2 weeks
e9ae9fa937