Updated mediawiki/extensions
Project: mediawiki/extensions/CentralAuth  7b268ce670e1afcde13001dad210952d23d62b8f

Fix "old style" logout

Gerrit 82634 had two bugs when used with $wgCentralAuthUseOldAutoLogin
* Reference to an uninitialized object
* Special:AutoLogin couldn't authorize the token, and so retruned an
  error instead of sending delete cookies

bug: 53962
Change-Id: I10285f7ebc8ea928f3627318ef590bfb2a692d52