$targetUser: the user whom to send talk page email notification
$title: the page title
+'SendWatchlistEmailNotification': Return true to send watchlist email notification
+$targetUser: the user whom to send watchlist email notification
+$title: the page title
+$this: EmailNotification object
+
'AbortChangePassword': Return false to cancel password change.
$user: the User object to which the password change is occuring
$mOldpass: the old password provided by the user