Merge branch '4.4' into 5.2

* 4.4:
  [HttpClient][PHPDoc] Fix 2 remaining return mixed
  [Cache] [FrameworkBundle] Fix logging for TagAwareAdapter
  [Route] Better inline requirements and defaults parsing
  Simplified condition and removed unused code from AbstractSessionListener::onKernelRequest
  [PhpUnitBridge] Fix phpunit symlink on Windows
  [Yaml] Fixed infinite loop when parser goes through an additional and invalid closing tag

Author: derrabus

EventListener/AbstractSessionListener.php

@@ -56,14 +56,13 @@ public function onKernelRequest(RequestEvent $event)
             return;
         }
 
-        $session = null;
         $request = $event->getRequest();
         if (!$request->hasSession()) {
             $sess = null;
             $request->setSessionFactory(function () use (&$sess) { return $sess ?? $sess = $this->getSession(); });
         }
 
-        $session = $session ?? ($this->container && $this->container->has('initialized_session') ? $this->container->get('initialized_session') : null);
+        $session = $this->container && $this->container->has('initialized_session') ? $this->container->get('initialized_session') : null;
         $this->sessionUsageStack[] = $session instanceof Session ? $session->getUsageIndex() : 0;
     }