If the Referred-By header is set call the normal `auto in` code. If it isn't set that means someone called it directly, call `auto out` ato attempt to pop the calls in the lot in FIFO order. This also changes the parking lot name from `park` to `5900` this allows phones to monitor `park+5900` to get the status of the whole parking lot. Before you would have to monitor `park+park` to get this functionality.