From Server#close() javadocs: Closes all open connections and the
server ports.
If you close a server you can reopen it by calling bind. If you close
a client you can reopen it by calling connect.
If you are running a server or client by calling start, you can call
stop to both close it and stop its update thread. For a client, if you
call stop you will have to call start again before you can reopen it
using connect.
-Nate