{HttpFoundation] [Session] fixed session compatibility with memcached/redis session storage

Per https://bugs.php.net/bug.php?id=61470, and in fixing #7380, the following error occurs 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.)".  This patch applies the first fix only if the session store is "files"

{HttpFoundation] [Session] fixed session compatibility with memcached/redis session storage

Per https://bugs.php.net/bug.php?id=61470, and in fixing #7380, the following error occurs 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.)".  This patch applies the first fix only if the session store is "files"
fixed CS
Merge branch '2.2' into 2.3

* 2.2:
  fixed CS
  {HttpFoundation] [Session] fixed session compatibility with memcached/redis session storage
  fixed CS
  Fixes for hasParameterOption and getParameterOption methods of ArgvInput