Server commands

For now, servers commands are not implemented. We are soon going to them.

Exemple of next commands :

server, skiptrack : vote to skip the track (only work during the first lap)
server, nexttrack : vote for the next track
server, listtracks : display the list of tracks
server, restartrace : vote to restart the race (only work during the first lap)
server, kick [slot] : vote to kick a rider
….