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

3 files changed, 4 insertions, 3 deletions

diff --git a/Core/Authentication/Provider/AnonymousAuthenticationProvider.php b/Core/Authentication/Provider/AnonymousAuthenticationProvider.php
index ea91075..7fbbf85 100644
--- a/Core/Authentication/Provider/AnonymousAuthenticationProvider.php
+++ b/Core/Authentication/Provider/AnonymousAuthenticationProvider.php
@@ -40,7 +40,7 @@ class AnonymousAuthenticationProvider implements AuthenticationProviderInterface
     public function authenticate(TokenInterface $token)
     {
         if (!$this->supports($token)) {
-            return null;
+            return;
         }
 
         if ($this->key !== $token->getKey()) {
diff --git a/Core/Authentication/Provider/PreAuthenticatedAuthenticationProvider.php b/Core/Authentication/Provider/PreAuthenticatedAuthenticationProvider.php
index f4d0959..11c3cda 100644
--- a/Core/Authentication/Provider/PreAuthenticatedAuthenticationProvider.php
+++ b/Core/Authentication/Provider/PreAuthenticatedAuthenticationProvider.php
@@ -53,8 +53,9 @@ class PreAuthenticatedAuthenticationProvider implements AuthenticationProviderIn
     public function authenticate(TokenInterface $token)
     {
         if (!$this->supports($token)) {
-            return null;
+            return;
         }
+
         if (!$user = $token->getUser()) {
             throw new BadCredentialsException('No pre-authenticated principal found in request.');
         }
diff --git a/Core/Authentication/Provider/UserAuthenticationProvider.php b/Core/Authentication/Provider/UserAuthenticationProvider.php
index 14fbdda..3728c01 100644
--- a/Core/Authentication/Provider/UserAuthenticationProvider.php
+++ b/Core/Authentication/Provider/UserAuthenticationProvider.php
@@ -58,7 +58,7 @@ abstract class UserAuthenticationProvider implements AuthenticationProviderInter
     public function authenticate(TokenInterface $token)
     {
         if (!$this->supports($token)) {
-            return null;
+            return;
         }
 
         $username = $token->getUsername();