When we start the server from the proxy, we shouldn't need to start a proxy instance: we could just pass the existing socket connection to the new server subprocess. This will make the connection much quicker and efficient.
Difficulties:
--socket-fd
, does the new server need to dup() the fd?
socket-fd-hello fd hellopacketdata
See also #1680.
Hard!
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1684