Server sends connecting client info (client id and user id) so that local client can be created
Set client username as steam name
Set client authority if it was created on server
Add chatbox to NetTest so it can be tested through new networking
Server renames player name if it's in use, sends the name in client info message (only useful right now for testing multiple clients with same steamid)
Send client info for every client on server, not just the connecting client