mmanon: does not work when IP starts with 9 or when IP is not followed by space or colon

The mmanon plugin as included in Ubuntu 14.04 trusty (package version 7.4.4-1ubuntu2.6) does not always work correctly. There are two notable conditions in which the plugin does not behave as expected:

a) an IP address starts with '9'. For details see the upstream bug report: <http://bugzilla.adiscon.com/show_bug.cgi?id=529>. The bug is fixed in this commit: <https://github.com/rsyslog/rsyslog/commit/09e4d853604aaa71e7b364e598bf1f1c88b5270d>

b) an IP address is followed by a character that is not a space (" ") or a colon (":"). This for example breaks mmanon functionality for postfix, where IP addresses are usually followed by the "]" character. This can be fixed by merging this commit: <https://github.com/rsyslog/rsyslog/commit/f86d32638d6f7120608d9beeb25b4bb3be9ab5c2#diff-c29d883a9e66d9d088e71589dd379961>