Added a small Upgrade note regarding security.context

Author: Iltar van der Berg

Http/Firewall/ContextListener.php

@@ -101,7 +101,7 @@ public function handle(GetResponseEvent $event)
     }
 
     /**
-     * Writes the SecurityContext to the session.
+     * Writes the security token into the session.
      *
      * @param FilterResponseEvent $event A FilterResponseEvent instance
      */
@@ -121,10 +121,6 @@ public function onKernelResponse(FilterResponseEvent $event)
         $request = $event->getRequest();
         $session = $request->getSession();
 
-        if (null === $session) {
-            return;
-        }
-
         if ((null === $token = $this->tokenStorage->getToken()) || ($token instanceof AnonymousToken)) {
             if ($request->hasPreviousSession()) {
                 $session->remove($this->sessionKey);

Http/RememberMe/RememberMeServicesInterface.php

@@ -36,8 +36,8 @@ interface RememberMeServicesInterface
     const COOKIE_ATTR_NAME = '_security_remember_me_cookie';
 
     /**
-     * This method will be called whenever the SecurityContext does not contain
-     * an TokenInterface object and the framework wishes to provide an implementation
+     * This method will be called whenever the TokenStorage does not contain
+     * a TokenInterface object and the framework wishes to provide an implementation
      * with an opportunity to authenticate the request using remember-me capabilities.
      *
      * No attempt whatsoever is made to determine whether the browser has requested

Http/Session/SessionAuthenticationStrategyInterface.php

@@ -27,7 +27,7 @@ interface SessionAuthenticationStrategyInterface
     /**
      * This performs any necessary changes to the session.
      *
-     * This method is called before the SecurityContext is populated with a
+     * This method is called before the TokenStorage is populated with a
      * Token, and only by classes inheriting from AbstractAuthenticationListener.
      *
      * @param Request        $request