Last modified: 2014-04-24 12:44:31 UTC
I believe it is safe to say that the Extension Matrix [1] is not longer being supported. Thus the reference to is should be removed from the message. [1] https://www.mediawiki.org/wiki/Extension_Matrix
Change 129398 had a related patch set uploaded by Siebrand: Update message "config-extension-link" https://gerrit.wikimedia.org/r/129398
Change 129398 merged by jenkins-bot: Update message "config-extension-link" https://gerrit.wikimedia.org/r/129398
Well, this was a fast one. Great and thank you!