search for: _find_default_driver_id

Ok, this patch replaces the old patch I sent, and it does a bit more. For one, it sorts the linked list of drivers based on the priority values, highest valued ones coming first. That allows the _find_default_driver_id code to stop looping (break) immediately when it finds a driver that works, because it already knows it's the working driver with the highest priority (what it normally returns anyway). The advantage to sorting based on priority, is it gives us some control over what order the drivers are test...