Merge branch 'master' into jgrpp

# Conflicts:
#	src/lang/arabic_egypt.txt
#	src/station_cmd.cpp
#	src/station_cmd.h
#	src/timetable_cmd.cpp
#	src/train_cmd.cpp

src/train_cmd.cpp

@@ -3074,6 +3074,7 @@ CommandCost CmdReverseTrainDirection(TileIndex tile, DoCommandFlag flags, uint32
 		}
 	} else {
 		/* turn the whole train around */
+		if (!v->IsPrimaryVehicle()) return CMD_ERROR;
 		if ((v->vehstatus & VS_CRASHED) || HasBit(v->flags, VRF_BREAKDOWN_STOPPED)) return CMD_ERROR;
 
 		if (flags & DC_EXEC) {