Merge branch '4.4' into 5.0

* 4.4:
  [Http Foundation] Fix clear cookie samesite
  [Security] Check if firewall is stateless before checking for session/previous session
  [Form] Support customized intl php.ini settings
  [Security] Remember me: allow to set the samesite cookie flag
  [Debug] fix for PHP 7.3.16+/7.4.4+
  [Validator] Backport translations
  [Mailer] Use %d instead of %s for error code in error messages
  [HttpKernel] fix locking for PHP 7.4+
  [Security] Fixed hardcoded value of SODIUM_CRYPTO_PWHASH_MEMLIMIT_INTERACTIVE
  Prevent warning in proc_open()
  [FrameworkBundle] Fix Router Cache
  Fix deprecation messages

Routing/Router.php

@@ -14,6 +14,8 @@
 use Psr\Container\ContainerInterface;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\Config\Loader\LoaderInterface;
+use Symfony\Component\Config\Resource\FileExistenceResource;
+use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\DependencyInjection\Config\ContainerParametersResource;
 use Symfony\Component\DependencyInjection\ContainerInterface as SymfonyContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
@@ -71,6 +73,16 @@ public function getRouteCollection()
             $this->collection = $this->container->get('routing.loader')->load($this->resource, $this->options['resource_type']);
             $this->resolveParameters($this->collection);
             $this->collection->addResource(new ContainerParametersResource($this->collectedParameters));
+
+            try {
+                $containerFile = ($this->paramFetcher)('kernel.cache_dir').'/'.($this->paramFetcher)('kernel.container_class').'.php';
+                if (file_exists($containerFile)) {
+                    $this->collection->addResource(new FileResource($containerFile));
+                } else {
+                    $this->collection->addResource(new FileExistenceResource($containerFile));
+                }
+            } catch (ParameterNotFoundException $exception) {
+            }
         }
 
         return $this->collection;