To use cheat codes in multiplayer mode, you must run the server with
the following command: +set cheats 1

I also found the following in the source code, These are not cheats
at all, but seem to be multiplayer actions or communications that
you can do to other other players in the game.

point
wave
salute
taunt
flipoff
putaway

wave 0 is the flipoff
wave 1 is the salute
wave 2 is the taunt
wave 3 is a wave
wave 4 is point