Merge branch '2.4'

* 2.4:
  unified return null usages
  [Validator] added Japanese translation
  Textarea value should default to empty string instead of null.
  Fix doc blocks
  [Process] Fix #10681, process are failing on Windows Server 2003
  updated doc
  [Security] fix DBAL connection typehint
  [HttpFoundation] status 201 is allowed to have a body
  unified return null usages

Conflicts:
	src/Symfony/Component/DependencyInjection/ContainerBuilder.php
	src/Symfony/Component/DomCrawler/Crawler.php
	src/Symfony/Component/Security/Core/Authentication/Provider/PreAuthenticatedAuthenticationProvider.php

Author: fabpot

Tests/Normalizer/GetSetMethodNormalizerTest.php

@@ -168,7 +168,7 @@ public function provideCallbacks()
             array(
                 array(
                     'bar' => function ($bar) {
-                        return null;
+                        return;
                     },
                 ),
                 'baz',