Merge branch '4.4' into 5.1

* 4.4:
  fix merge
  drop logger mock in favor of using the BufferingLogger
  catch ValueError thrown on PHP 8
  [Yaml Parser] Fix edge cases when parsing multiple documents
  fix parsing comments not prefixed by a space
  [Translator] Make sure a null locale is handled properly
  deal with errors being thrown on PHP 8
  [Cache] Allow cache tags to be objects implementing __toString()
  [HttpKernel] Do not override max_redirects option in HttpClientKernel
  remove superfluous cast
  [HttpClient] Support for CURLOPT_LOCALPORT.
  Upgrade PHPUnit to 8.5 (php 7.2) and 9.3 (php >= 7.3).
  Fixed exception message formatting
  [FrameworkBundle] Fix error in xsd which prevent to register more than one metadata
  [Console] work around disabled putenv()
  [PhpUnitBridge] Fix error with ReflectionClass
  [HttpClient][HttpClientTrait] don't calculate alternatives if option is auth_ntlm
  Change 'cache_key' to AbstractRendererEngine::CACHE_KEY_VAR
  Upgrade PHPUnit to 8.5 (php 7.2) and 9.3 (php >= 7.3).

Author: xabbuh

Constraints/TimezoneValidator.php

@@ -78,7 +78,11 @@ public function validate($value, Constraint $constraint)
     private static function getPhpTimezones(int $zone, string $countryCode = null): array
     {
         if (null !== $countryCode) {
-            return @\DateTimeZone::listIdentifiers($zone, $countryCode) ?: [];
+            try {
+                return @\DateTimeZone::listIdentifiers($zone, $countryCode) ?: [];
+            } catch (\ValueError $e) {
+                return [];
+            }
         }
 
         return \DateTimeZone::listIdentifiers($zone);