- Replaced the use of / by DIRECTORY_SEPARATOR in a couple of places.
- Check for obsolete variables is now only done in the login_page.php as well as admin pages.
- Add config_obsolete() to config_api.php
- Added core/obsolete.php to call config_obsolete for all obsolete variables.
- Localised "cached"

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1369 f5dc347c-c33d-0410-90a0-b07cc1902cb9