did not return with proper return value

Conflicts:
	ChangeLog
	plugins/imrelp/imrelp.c

Conflicts:
	ChangeLog
	configure.ac
	doc/manual.html
	doc/rsyslog_conf_modules.html
	plugins/imrelp/imrelp.c

now also properly works with privilege drop

Conflicts:
	runtime/queue.c

If the the multi-submit interface was used and a QUEUE_FULL condition
occured, the failed message was properly destructed. However, the
rest of the input batch, if it existed, was not processed. So this
lead to potential loss of messages and a memory leak. The potential
loss of messages was IMHO minor, because they would have been dropped
in most cases due to the queue remaining full, but very few lucky ones
from the batch may have made it. Anyhow, this has now been changed so
that the rest of the batch is properly tried to be enqueued and, if
not possible, destructed.

Conflicts:
	tools/omfwd.c

closes: http://bugzilla.adiscon.com/show_bug.cgi?id=258