Merge branch '3.3' into 3.4

* 3.3: (64 commits)
  Show exception is checked twice in ExceptionController of twig
  allow SSI fragments configuration in XML files
  Display a better error message when the toolbar cannot be displayed
  render hidden _method field in form_rest()
  Add Doctrine Cache to dev dependencies to fix failing unit tests.
  return fallback locales whenever possible
  Fix Predis client cluster with pipeline
  [Dotenv] Test load() with multiple paths
  [Console] Fix catching exception type in QuestionHelper
  Improved the exception page when there is no message
  [WebProfilerBundle] Eliminate line wrap on count columnt (routing)
  [Validator] replace hardcoded service id
  [Routing] Fix XmlFileLoader exception message
  [DI] Dedup tags when using instanceof/autoconfigure
  [Translation] Fix FileLoader::loadResource() php doc
  Sessions: configurable "use_strict_mode" option for NativeSessionStorage
  [FrameworkBundle] [Command] Clean bundle directory, fixes #23177
  fixed CS
  [WebProfilerBundle] Fix the icon for the Cache panel
  [WebServerBundle] Fix router script path and check existence
  ...

Author: xabbuh

DependencyInjection/AddConstraintValidatorsPass.php

@@ -49,7 +49,7 @@ public function process(ContainerBuilder $container)
         }
 
         $container
-            ->getDefinition('validator.validator_factory')
+            ->getDefinition($this->validatorFactoryServiceId)
             ->replaceArgument(0, ServiceLocatorTagPass::register($container, $validators))
         ;
     }