o Correction lock categories and is_admin (functions with parameters now)
o Cannot use check_status with upgrade.php and upgrade_feed.php => New function check_upgrade use in upgrade*.php (new functionality for upgrade_feed.php)
o upgrade_feed.php is showed only for administrator user
git-svn-id: http://piwigo.org/svn/trunk@1075 68402e56-0260-453c-a942-63ccdbb3a9ee
