(No more -port 5030 when you join your own server for testing!)
-port 5030
Also fixed potential crash if the argument to -port was too long.
-port
I've also added -clientport, in case you want a specific port as a client. (You probably don't.)
-clientport
If you ever need to, you can change the client port number.
Using strcpy is stupid because we don't know how long the argument would be. There's no need for a buffer anyway.
