Set the speed limit of a red light as 0. One can follow a train in the dispatcher window.
Multiplayer: penalty of applying emergency brake on overspeed/pass red is now a choice in the dispatcher window.
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@1311 a9f3cfff-6c41-7446-b0ca-052bd761e6eb