Merge branch '2.2' into 2.3

* 2.2:
  fixed CS
  Fixed the error handling when decoding invalid XML to avoid a Warning
  [Form] Fixed: The "data" option is taken into account even if it is NULL
  [DomCrawler] [HttpFoundation] Make `Content-Type` attributes identification case-insensitive

Conflicts:
	src/Symfony/Component/Form/Extension/Core/Type/FormType.php

Author: fabpot

Firewall/AbstractPreAuthenticatedListener.php

@@ -97,7 +97,7 @@ final public function handle(GetResponseEvent $event)
 
     /**
      * Clears a PreAuthenticatedToken for this provider (if present)
-     * 
+     *
      * @param AuthenticationException $exception
      */
     private function clearToken(AuthenticationException $exception)