This commit adds an overflow rerouting system customizable by modifying
the config. If the config values are set, after X amount of clients have
connected, the server will start rerouting all new players to the
configuration "overflow" server. Note that admins are immune to this, and
therefore will not be rerouted under any circumstance. Players that have
already connected and have a body will not be rerouted either, this will
only affect new players that get sent to the lobby.
It probably would also kick players if an admin sent them to the lobby,
but that's a very special case scenario.
This commit ports baystation12's implementation of starlight, modified to
rely on the master-controller due to differences between us, -tg-, and
bay12. Starlight allows space tiles to give off light, the amount of light
can be configured in config.txt.
