Don't die if one tempfile() invocation fails, return an error instead
remove illegal jabber functionality (disabled by default anyway)

http://www.gnu.org/licenses/license-list.en.html#josl
⇒ not GPL compatible
Merge branch 'Branch_5_1' into Branch_5_2
Merge remote-tracking branch 'origin/Branch_5_1' into Branch_5_2
Fail the Debian build on Lintian errors
Invoke lintian from the proper location
Only pull loggerhead from jessie, the rest can come from wheezy
Force English locale when generating date to avoid non-ASCII characters in generated file
Fix cache when group is approved
Avoid 'Undefined offset' notices if no tooltip message for a plugin