Updated mediawiki/extensions
Project: mediawiki/extensions/DPLforum  390d6fed598b23e8b168c21d2035274639f24a2c

General fixes, style and comments / phpdoc

Add phpdoc to benefit editors
Remove used of a deprected method
Stop assigning in conditions

Change-Id: I24dceed8944d79eaeebf619ac8e449e7d02ece14