Be slightly more aggressive awhen switching to a new route.

route.c

@@ -305,7 +305,7 @@ update_route_metric(struct route *route)
         if(route->installed) {
             struct route *better_route;
             better_route = find_best_route(route->dest);
-            if(better_route->metric < route->metric - 196)
+            if(better_route->metric <= route->metric - 96)
                 consider_route(better_route);
             else
                 send_triggered_update(route, oldmetric);