Merge branch '2.3' into 2.4

* 2.3:
  Update validators.eu.xlf
  fixed CS
  remove unused imports
  Unify null comparisons
  [EventDispatcher] don't count empty listeners
  [Process] Fix unit tests in sigchild environment
  [Process] fix signal handling in wait()
  [BrowserKit] refactor code and fix unquoted regex
  Fixed server HTTP_HOST port uri conversion
  Bring code into standard
  [Process] Add test to verify fix for issue #11421
  [Process] Fixes issue #11421
  [DependencyInjection] Pass a Scope instance instead of a scope name.

Conflicts:
	src/Symfony/Component/EventDispatcher/Tests/EventDispatcherTest.php

Author: fabpot

RememberMe/AbstractRememberMeServices.php

@@ -303,7 +303,7 @@ protected function isRememberMeRequested(Request $request)
 
         $parameter = $request->get($this->options['remember_me_parameter'], null, true);
 
-        if ($parameter === null && null !== $this->logger) {
+        if (null === $parameter && null !== $this->logger) {
             $this->logger->debug(sprintf('Did not send remember-me cookie (remember-me parameter "%s" was not sent).', $this->options['remember_me_parameter']));
         }