An attempt to fix issue #7380 and https://bugs.php.net/bug.php?id=61470, a file-based session issue, causes the following error when using a Memcache or Redis session store w/ Symfony security:  "Authentication exception occurred; redirecting to authentication entry point (A Token was not found in the SecurityContext.)"  Closes #7380.
Merge branch 'master' of https://github.com/klmatom/symfony