Merge branch '3.4' into 4.3

* 3.4:
  [DependencyInjection] Fix broken references in tests
  Avoid using of kernel after shutdown
  Simplify PHP CS Fixer configuration
  [FrameworkBundle] [HttpKernel] fixed correct EOL and EOM month
  Fix MockFileSessionStorageTest::sessionDir being used after it's unset
  bumped Symfony version to 3.4.34
  updated VERSION for 3.4.33
  update CONTRIBUTORS for 3.4.33
  updated CHANGELOG for 3.4.33
  [Stopwatch] Fixed a bug in stopwatch event getStartTime
  [Stopwatch] Fixed bug in getDuration when counting multiple ongoing periods
  Adding some validations tags on validators.et.xlf
  add missing translation for 94 (it)

Author: nicolas-grekas

Tests/Session/Storage/MockFileSessionStorageTest.php

@@ -41,12 +41,12 @@ protected function setUp(): void
 
     protected function tearDown(): void
     {
-        $this->sessionDir = null;
-        $this->storage = null;
-        array_map('unlink', glob($this->sessionDir.'/*.session'));
+        array_map('unlink', glob($this->sessionDir.'/*'));
         if (is_dir($this->sessionDir)) {
             rmdir($this->sessionDir);
         }
+        $this->sessionDir = null;
+        $this->storage = null;
     }
 
     public function testStart()