Merge branch '5.4' into 6.4

* 5.4:
  [Router] Discard in-memory cache of routes when writing the file-based cache
  [Security] Verify Hungarian translation
  force HTTP 1.1 for Mailgun API requests
  [String] Revert "Fixed u()->snake(), b()->snake() and s()->snake() methods"
  normalize underscores in snake()
  [Security][Validator] Added missing Portuguese(pt) translations
  Fixes #54550 some pt_BR translations
  Fix MockArraySessionStorage to generate more conform ids
  Bump Symfony version to 5.4.42
  Update VERSION for 5.4.41
  Update CONTRIBUTORS for 5.4.41
  Update CHANGELOG for 5.4.41

Author: derrabus

Session/Storage/MockArraySessionStorage.php

@@ -216,7 +216,7 @@ public function getMetadataBag(): MetadataBag
      */
     protected function generateId(): string
     {
-        return hash('sha256', uniqid('ss_mock_', true));
+        return bin2hex(random_bytes(16));
     }
 
     /**