[BUGFIX] Fixed SESSION not shutdown correctly when using redirect.

- Disabled multiple route rendering by default.

src/Pecee/Http/Response.php

@@ -39,6 +39,9 @@ class Response
             $this->httpCode($httpCode);
         }
 
+        // Gracefully end session (avoid any changes being lost)
+        session_write_close();
+
         $this->header('location: ' . $url);
         exit(0);
     }

src/Pecee/SimpleRouter/Router.php

@@ -122,7 +122,7 @@ class Router
      * When disabled the router will stop execution when first route is found.
      * @var bool
      */
-    protected $renderMultipleRoutes = true;
+    protected $renderMultipleRoutes = false;
 
     /**
      * Router constructor.