Typo in meminfo plugin

fragmentztion -> fragmentation
Update df.in

SunOS plugin - more mount points to ignore...
Update bind9.in

Add a comment on the embedded documentation about the configured max size of the log file.
Merge remote branch 'pull/161' into devel
Merge remote branch 'pull/182' into devel
Merge remote branch 'pull/177' into devel
travis: change the IRC template

Avoid triggering the munin#9999 hook
travis: failing fast

We don't need to continue any build when at least 1 test is failing.
As our test matrix is fairly large, being gentle to ressources is nice.