Chatroom Behavior  Basic: client types a message and presses enter; server will receive the message and broadcasts to all clients  Special Commands:  If a client types /exit, /quit or /part, client exits; server prints a message that client(alias) has left  If a client presses Ctrl+C, a nice error message is printed and the user is asked to type /exit, /quit or /part  If Ctrl+C is pressed on the Server side, the server tells the clients that it will shut down in 10 seconds.
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