Merge branch 'day_length-sx' into jgrpp

Conflicts:
	src/lang/english.txt
	src/saveload/extended_ver_sl.cpp
	src/saveload/extended_ver_sl.h
	src/timetable_cmd.cpp

src/vehicle.cpp

@@ -947,7 +947,7 @@ void CallVehicleTicks()
 {
 	_vehicles_to_autoreplace.Clear();
 
-	RunVehicleDayProc();
+	if (_tick_skip_counter == 0) RunVehicleDayProc();
 
 	Station *st;
 	FOR_ALL_STATIONS(st) LoadUnloadStation(st);