add comment to boostrap.

laravel/laravel.php

@@ -149,10 +149,10 @@ foreach (Bundle::all() as $bundle => $config)
 }
 
 /**
- * Route the request to the proper route in the application. If a
- * route is found, the route will be called via the request class
- * static property. If no route is found, the 404 response will
- * be returned to the browser.
+ * If the requset URI has too many segments, we will bomb out of
+ * the request. This is too avoid potential DDoS attacks against
+ * the framework by overloading the controller lookup method
+ * with thousands of segments.
  */
 $uri = URI::current();
 
@@ -161,6 +161,12 @@ if (count(URI::$segments) > 15)
 	throw new \Exception("Invalid request. Too many URI segments.");
 }
 
+/**
+ * Route the request to the proper route in the application. If a
+ * route is found, the route will be called via the request class
+ * static property. If no route is found, the 404 response will
+ * be returned to the browser.
+ */
 Request::$route = Routing\Router::route(Request::method(), $uri);
 
 if (is_null(Request::$route))