merged branch ouardisoft/2.0 (PR #4300)

Commits
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d1c831d Change must-proxy-revalidate by proxy-revalidate

Discussion
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Change must-proxy-revalidate by proxy-revalidate

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by travisbot at 2012-05-16T09:20:54Z

This pull request [passes](http://travis-ci.org/symfony/symfony/builds/1344060) (merged d1c831d7 into 8cd6cbcf).

src/Symfony/Component/HttpFoundation/Response.php

@@ -401,7 +401,7 @@ class Response
      */
     public function mustRevalidate()
     {
-        return $this->headers->hasCacheControlDirective('must-revalidate') || $this->headers->has('must-proxy-revalidate');
+        return $this->headers->hasCacheControlDirective('must-revalidate') || $this->headers->has('proxy-revalidate');
     }
 
     /**