Improve security of sessions:

- use only cookies to store session id on client side
- use default php session system with database handler to store sessions on server side

git-svn-id: http://piwigo.org/svn/trunk@1004 68402e56-0260-453c-a942-63ccdbb3a9ee

admin/user_perm.php

@@ -133,11 +133,9 @@ $template->assign_vars(
     'L_CAT_OPTIONS_FALSE'=>$lang['forbidden'],
     
     'F_ACTION' =>
-      add_session_id(
         PHPWG_ROOT_PATH.
         'admin.php?page=user_perm'.
         '&user_id='.$page['user']
-        )
     )
   );