Not in the POSIX specification, but defined (not behind any guards)
in (at least) FreeBSD, NetBSD, glibc, and macOS.
Found by miqlas and myself while working on porting GNU inetutils.
Cleaned up some header style violations, making sure there are two blank lines after the header guards.
This fixes the posix header part of #2191.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39288 a95241bf-73f2-0310-859d-f6bbb57e9c96
Note, LOG_SERIAL does neither work in our implementation, nor in the original
implementation by Be.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5345 a95241bf-73f2-0310-859d-f6bbb57e9c96
don't define some (unneeded) macros, and LOG_TMID & LOG_THID are gone
(they were specified to be the same as LOG_PID).
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5327 a95241bf-73f2-0310-859d-f6bbb57e9c96