Merge branch '4.4' into 5.0

* 4.4:
  [DI] Fix CheckTypeDeclarationPass
  [Security/Http] don't require the session to be started when tracking its id
  [DI] fix preloading script generation

Author: nicolas-grekas

Authentication/AuthenticationProviderManager.php

@@ -21,6 +21,11 @@
 use Symfony\Component\Security\Core\Exception\ProviderNotFoundException;
 use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
+// Help opcache.preload discover always-needed symbols
+class_exists(AuthenticationEvents::class);
+class_exists(AuthenticationFailureEvent::class);
+class_exists(AuthenticationSuccessEvent::class);
+
 /**
  * AuthenticationProviderManager uses a list of AuthenticationProviderInterface
  * instances to authenticate a Token.

Authorization/ExpressionLanguage.php

@@ -14,6 +14,9 @@
 use Psr\Cache\CacheItemPoolInterface;
 use Symfony\Component\ExpressionLanguage\ExpressionLanguage as BaseExpressionLanguage;
 
+// Help opcache.preload discover always-needed symbols
+class_exists(ExpressionLanguageProvider::class);
+
 if (!class_exists(BaseExpressionLanguage::class)) {
     throw new \LogicException(sprintf('The "%s" class requires the "ExpressionLanguage" component. Try running "composer require symfony/expression-language".', ExpressionLanguage::class));
 } else {