Resend because: on server restarts the server will lose the stage and costume information.
If only one client is connected to the server, the packets currently aren't resent, so the server doesn't know in which stage the client is and what
costume it wears
(which I'd like to display on the website).
With more then one client connected it already works, because when another client joins the server, the client will send both packets.
Enable the full keyboard to enter non-numbers and increase max length from 15 to 50 for longer hostnames.
I know FQDNs can be longer than 50 characters, but that's less common (and painful to type on the Switch).
