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).

Application.php

@@ -107,8 +107,10 @@ public function setCommandLoader(CommandLoaderInterface $commandLoader)
      */
     public function run(InputInterface $input = null, OutputInterface $output = null)
     {
-        putenv('LINES='.$this->terminal->getHeight());
-        putenv('COLUMNS='.$this->terminal->getWidth());
+        if (\function_exists('putenv')) {
+            @putenv('LINES='.$this->terminal->getHeight());
+            @putenv('COLUMNS='.$this->terminal->getWidth());
+        }
 
         if (null === $input) {
             $input = new ArgvInput();
@@ -891,7 +893,9 @@ protected function configureIO(InputInterface $input, OutputInterface $output)
             $input->setInteractive(false);
         }
 
-        putenv('SHELL_VERBOSITY='.$shellVerbosity);
+        if (\function_exists('putenv')) {
+            @putenv('SHELL_VERBOSITY='.$shellVerbosity);
+        }
         $_ENV['SHELL_VERBOSITY'] = $shellVerbosity;
         $_SERVER['SHELL_VERBOSITY'] = $shellVerbosity;
     }