CommandAdapter fails to handle multiple requests in one message

[GDYendell]

If requests are sent quickly by a client, a single read by the server can contain multiple requests, e.g. b'N02=0\r\nN03=0\r\nN04=0\r\n'

If CommandAdapter was updated to take a terminator (\r\n) instead of a format string (%b\r\n), TcpIo could handle multiple requests by splitting the data from the read by the terminator and passing each one separately to the handler, but this will break a lot of things. I couldn't see a sensible way to do it with just the format string because it would have to make too many assumptions.