A multiuser TCP/IP based chat server and GUI client program
To start the server, run ‘racket’ and evaluate (enter! “server.rkt”).
By default the server listens on port 1234. This is specified at the top of server.rkt
To start the client run ‘racket client.rkt’.
By default the client connects to 127.0.0.1:1234. This can be changed at the top of client.rkt