Merge branch '2.1' into 2.2

* 2.1:
  changed sub-requests creation to '::create()'

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/HttpKernel.php
	src/Symfony/Component/Security/Http/HttpUtils.php

HttpCache/Store.php

@@ -250,7 +250,7 @@ public function invalidate(Request $request)
         // As per the RFC, invalidate Location and Content-Location URLs if present
         foreach (array('Location', 'Content-Location') as $header) {
             if ($uri = $request->headers->get($header)) {
-                $subRequest = call_user_func(array(get_class($request), 'create'), 'get', array(), array(), array(), $request->server->all());
+                $subRequest = $request::create($uri, 'get', array(), array(), array(), $request->server->all());
 
                 $this->invalidate($subRequest);
             }