Friendly timeout message

[AMerkuri]

Instead of client receiving regular timeout message is it possible to kick connecting client with message like "Server starting, try again in 30 seconds"?
McMyAdmin/AMP shows something like this:

[csauve]

Not sure how easy it is to send back this type of message from just the proxy level, so need to investigate what McMyAdmin/AMP is doing. Another potential solution is to have another "waiting room" server which is running on the cheap hardware and has a small readonly world. It should be possible to send clients there first, then once the real server has started it could use RCON to move clients to it and begin proxying that server instead.