Updated mediawiki/extensions
Project: mediawiki/extensions/MediaWikiChat  3ff375907c57cab6a9e00485aa634f2adc4606f9

i18n: fix "user-is-moderator"

- message "user-is-a moderator" is not defined
- add full-stops to messages

Change-Id: I1d66eb838eed36e6921968e03657c49a195d777e