the imdiag implementation of "queue empty" was a bit racy, which
sometimes lead to too-early termination of rsyslogd and thus some
small memory leaks (which in turn showed up as problems during
make check). The current architecture is not able to 100% guard against
this, but the probleme probability has been reduced (and it showed to
improve in practice).

Conflicts:
	ChangeLog
	configure.ac
	doc/manual.html
	plugins/imfile/imfile.c
	plugins/imklog/imklog.c
	plugins/imptcp/imptcp.c
	plugins/imtcp/imtcp.c
	plugins/imuxsock/imuxsock.c
	plugins/mmsnmptrapd/mmsnmptrapd.c
	tools/omfile.c

If the kernel time-stamps messages, time is now take from that
timestamp instead of the system time when the message was read. This
provides much better accuracy. Thanks to Lennart Poettering for
suggesting this feature and his help during implementation.

This permits to read the time a message was submitted to the system
log socket. Most importantly, this is provided in microsecond resolution.
So we are able to obtain high precision timestampis even for messages
that were - as is usual - not formatted with them. This also simplifies
things in regard to local time calculation in chroot environments.
Many thanks to Lennart Poettering for suggesting this feature,
providing some guidance on implementing it and coordinating getting the
necessary support into the Linux kernel.

Conflicts:
	ChangeLog
	configure.ac