FIX: Crash on selecting depot in some cases.
FIX: Not possible to buy certain vehicles in the depot window
CHANGE: Increase default "server_frames_ahead" to 6 from 4 to improve network stability
FIX: Occasionally, convoys would wait for loading at the wrong stops.
FIX: Convoys would sometimes get stuck when waiting for a full load.
CODE: Add single threaded debug version for testing (MSVC)
CHANGE: When the public player makes a way public, the public player, not the player who owns the way, pays for the change of ownership and compensates the player who owns the way.
CHANGE: When the public player makes a way/stop public, the cost to the public player (and compensated to the owner) is based on the construction cost, not 60x the maintenance cost
CHANGE: Show a message whenever a stop/way is made public, even if the public player itself has done this.
FIX: "Go to depot" and replacing did not work properly for aircraft.
Merge branch '11.x' into passenger-generation