Updated mediawiki/extensions
Project: mediawiki/extensions/UserFunctions  644cbf8614250885f9dc98f91ef2cd4ee5f107a3

2.6.1 release

* Provide license information in extension credits
* Provide COPYING
* Consistenly use __DIR__
* Remove vanity

Change-Id: I6425140cdfbeed56aef4d4e548915221050f7cbd