I don't have permission to make commits. Could someone commit this changeset for me?

Just so you know, I initially had the payload transfer going over the existing bluetooth connection (by sending the payload transfer info followed by the payload itself), but if the payload had newline characters, then the processing got messed up (because newlines got stripped off as part of regular message processing). Also, with payloads of unknown lengths, it wouldn't be easily possible to determine the end of the payload. Therefore, I split it out to a separate connection.