* Added a new method and hook, User::isEveryoneAllowed() and
UserIsEveryoneAllowed, for use in situations where a "does everyone have this
right?" check is used to avoid more expensive checks.
+* Display "(No difference)" instead of an empty diff (when comparing revisions
+ in the history or when previewing changes while editing).
=== Bug fixes in 1.22 ===
* Disable Special:PasswordReset when $wgEnableEmail is false. Previously one