$create: Whether or not the restoration caused the page to be created
(i.e. it didn't exist before)
+'ArticleViewHeader': Before the parser cache is about to be tried for article viewing.
+&$pcache: whether to try the parser cache or not
+&$outputDone: whether the output for this page finished or not
+
'AuthPluginSetup': update or replace authentication plugin object ($wgAuth)
Gives a chance for an extension to set it programattically to a variable class.
&$auth: the $wgAuth object, probably a stub