(svn r18404) -Codechange: link drive through stops better together

-Feature: make penalty for road stop occupancy user configurable
-Fix [FS#1944]: road vehicles would not pick an empty drive through stop. Now they will *if* the penalty for driving around is less than the occupancy penalty
-Fix [FS#1495]: long (articulated) road vehicles could block loading of others when the following road vehicle already got 'permission' to go to the next bay even when it could not reach it
-Change: improve the throughput of the drive through road stops by letting them stop closer together

src/saveload/afterload.cpp

@@ -1360,7 +1360,7 @@ bool AfterLoadGame()
 		RoadVehicle *rv;
 		FOR_ALL_ROADVEHICLES(rv) {
 			if (rv->state == 250 || rv->state == 251) {
-				SetBit(rv->state, RVS_IS_STOPPING);
+				SetBit(rv->state, 2);
 			}
 		}
 	}
@@ -1959,6 +1959,8 @@ bool AfterLoadGame()
 		}
 	}
 
+	/* Road stops is 'only' updating some caches */
+	AfterLoadRoadStops();
 	AfterLoadLabelMaps();
 
 	GamelogPrintDebug(1);