'SetupAfterCache': Called in Setup.php, after cache objects are set
+'ShortPagesQuery': Allow extensions to modify the query used by
+Special:ShortPages.
+&$tables: tables to join in the query
+&$conds: conditions for the query
+&$joinConds: join conditions for the query
+&$options: options for the query
+
'ShowMissingArticle': Called when generating the output for a non-existent page.
$article: The article object corresponding to the page