which can be cascading (previously 'sysop' was hard-coded as the only one).
* XHTML5 support has been improved. If you set $wgMimeType = 'application/xhtml+xml'
MediaWiki will try outputting markup acording to XHTML5 rules.
+* New hook 'TitleSquidURLs' for manipulating the list of URLs to be purged from
+ HTTP caches when a page is changed.
=== Bug fixes in 1.22 ===
* Disable Special:PasswordReset when $wgEnableEmail is false. Previously one
$user: Current user object
&$whitelisted: Boolean value of whether this title is whitelisted
+'TitleSquidURLs': Called to determine which URLs to purge from HTTP caches.
+$this: Title object to purge
+&$urls: An array of URLs to purge from the caches, to be manipulated.
+
'UndeleteForm::showHistory': Called in UndeleteForm::showHistory, after a
PageArchive object has been created but before any further processing is done.
&$archive: PageArchive object