moved authen_config from lims_config.pl to main LIMS app - CUSTOM callback doesn't work when cfg loaded using Class::Singleton instance; modified idle timeout function to automatically load logged-in username in login screen, so only passwd required, and added link to logout if different user; cgiapp_prerun checks form param username matches authen; added region_code back to user_locations + admin functions}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1133 4177bd82-f056-0410-812d-caef170e3fa0
