Nostalgia was moved to an extension.
* Event namespace used by jquery.makeCollapsible has been changed from
'mw-collapse' to 'mw-collapsible' for consistency with the module name.
+* BREAKING CHANGE: The "ExternalAuth" authentication subsystem was removed, along
+ with its associated globals of $wgExternalAuthType, $wgExternalAuthConf,
+ $wgAutocreatePolicy and $wgAllowPrefChange. Affected users are encouraged to
+ use AuthPlugin for external authentication/authorization needs.
== Compatibility ==