CRAFTBOOK-2202 - Reported by Dark_Arc

Sk89q recently added the craftbook vehicles module to vincent (the vanilla server) and we've been going through several issues trying to get him to finish setting it up.
While trying to give us permission to create the control signs for the vehicle stuff, he accidentally disabled the signs entirely. Through testing, we discovered that the sort sign still functions even when it has been disabled. It continues to sort minecarts properly and send them in the right direction.

-- Originally added by kaitoyuuki