$user: user to promote.
&$promote: groups that will be added.
-'GetBlockedStatus': after loading blocking status of an user from the database
+'GetBlockedStatus': DEPRECATED since 1.34 - use GetUserBlock instead. After
+loading blocking status of a user from the database
&$user: user (object) being checked
'GetCacheVaryCookies': Get cookies that should vary cache options.
false if a UserGetRights hook might remove the named right.
$right: The user right being checked
-'UserIsHidden': Check if the user's name should be hidden. See User::isHidden().
+'UserIsHidden': DEPRECATED since 1.34 - use GetUserBlock instead, and add a
+system block that hides the user. Check if the user's name should be hidden.
+See User::isHidden().
$user: User in question.
&$hidden: Set true if the user's name should be hidden.