Changes:
* bugfix: invalid processing in QUEUE_FULL condition
* new module mmsnmptrapd, a sample message modification module
* bugfix: rate-limiting inside imuxsock did not work 100% correct
* bugfix: $myhostname not available in RainerScript (and no error message)
* bugfix: memory and file descriptor leak in stream processing
* bugfix: doc for impstats had wrong config statements
* bugfix: IPv6-address could not be specified in omrelp
* bugfix: TCP connection invalidly aborted when messages needed to be
* bugfix: $LocalHostName was not honored under all circumstances
* bugfix(minor): improper template function call in syslogd.c
Full changelog message at http://www.rsyslog.com/changelog-for-5-8-1-v5-stable/