Merge branch '2.3' into 2.5

* 2.3:
  [Form] Remove a redundant test.
  use value of DIRECTORY_SEPARATOR to detect Windows

Conflicts:
	src/Symfony/Component/Console/Application.php
	src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
	src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
	src/Symfony/Component/Process/Process.php

Author: fabpot

Core/Util/SecureRandom.php

@@ -43,7 +43,7 @@ public function __construct($seedFile = null, LoggerInterface $logger = null)
         $this->logger = $logger;
 
         // determine whether to use OpenSSL
-        if (defined('PHP_WINDOWS_VERSION_BUILD') && PHP_VERSION_ID < 50304) {
+        if ('\\' === DIRECTORY_SEPARATOR && PHP_VERSION_ID < 50304) {
             $this->useOpenSsl = false;
         } elseif (!function_exists('openssl_random_pseudo_bytes')) {
             if (null !== $this->logger) {