Keymaster_XH facilitates locking the administration area of a CMSimple_XH website, if a user is already logged in. This is necessary in case there is more than one user who has access to the back-end, as CMSimple_XH's back-end doesn't take any precautions against concurrent editing. After a configurable period of inactivity the admin is automatically logged out, to avoid locking the site "forever", if they forgot to log out properly. Before this happens the admin is warned and offered the possibility to prolong the session, to avoid loosing unsaved changes.
It requires a UTF-8 encoded CMSimple_XH installation. It is released under GPLv3.
If you have already installed at least version 1.0, you can download and install the patch. This won't overwrite any config, language or css files.