Merge branch '4.4'

* 4.4:
  [HttpKernel] Make DebugHandlersListener internal
  HttpKernel 4.4 is incompatible with Console 5 because of the EventDispatcher changes.
  Add missed use class for Symfony\Bundle\FrameworkBundle\Test\WebTestCase::$client
  bump Twig bridge dependency
  [HttpClient] Minor fix in an error message
  Fix parameter documentation for Inflector::pluralize() method
  Use a more appropriate group when deprecating mode
  Marked several components as incompatible with EventDispatcher 5.
  bumped Symfony version to 4.3.1
  updated VERSION for 4.3.0
  updated CHANGELOG for 4.3.0
  [FrameworkBundle] fix test fixture using deprecated controller and add missing deprecation
  exchanged $rootDir and $fileLinkFormatter arguments in DebugCommand
  [FrameworkBundle] Add a validation on the messenger section

Author: nicolas-grekas

DeprecationErrorHandler.php

@@ -228,9 +228,9 @@ private function getConfiguration()
             return $this->configuration = Configuration::inWeakMode();
         }
         if (self::MODE_WEAK_VENDORS === $mode) {
-            ++$this->deprecations['remaining selfCount'];
+            ++$this->deprecations['remaining directCount'];
             $msg = sprintf('Setting SYMFONY_DEPRECATIONS_HELPER to "%s" is deprecated in favor of "max[self]=0"', $mode);
-            $ref = &$this->deprecations['remaining self'][$msg]['count'];
+            $ref = &$this->deprecations['remaining direct'][$msg]['count'];
             ++$ref;
             $mode = 'max[self]=0';
         }