merge r 2306 from trunk to branch-1_7

- merged function ordering() with update_global_rank() and also optimized the queries

git-svn-id: http://piwigo.org/svn/branches/branch-1_7@2307 68402e56-0260-453c-a942-63ccdbb3a9ee

admin/maintenance.php

@@ -48,7 +48,6 @@ switch ($action)
   {
     update_uppercats();
     update_category('all');
-    ordering();
     update_global_rank();
     invalidate_user_cache();
     break;