Merge branch '2.3' into 2.5

* 2.3:
  [2.3] More cs fixes
  Removed unused imports
  CS fixes
  bumped Symfony version to 2.3.24
  updated VERSION for 2.3.23
  update CONTRIBUTORS for 2.3.23
  updated CHANGELOG for 2.3.23

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/EventListener/SessionListener.php
	src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
	src/Symfony/Component/HttpKernel/Kernel.php
	src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php
	src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php

Author: fabpot

DependencyInjection/Security/Factory/AbstractFactory.php

@@ -12,7 +12,6 @@
 namespace Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory;
 
 use Symfony\Component\Config\Definition\Builder\NodeDefinition;
-
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;

DependencyInjection/Security/Factory/HttpBasicFactory.php

@@ -12,7 +12,6 @@
 namespace Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory;
 
 use Symfony\Component\Config\Definition\Builder\NodeDefinition;
-
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;

DependencyInjection/Security/Factory/HttpDigestFactory.php

@@ -12,7 +12,6 @@
 namespace Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory;
 
 use Symfony\Component\Config\Definition\Builder\NodeDefinition;
-
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;

DependencyInjection/Security/Factory/X509Factory.php

@@ -12,9 +12,7 @@
 namespace Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory;
 
 use Symfony\Component\Config\Definition\Builder\NodeDefinition;
-
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
-
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 

DependencyInjection/Security/UserProvider/InMemoryFactory.php

@@ -12,7 +12,6 @@
 namespace Symfony\Bundle\SecurityBundle\DependencyInjection\Security\UserProvider;
 
 use Symfony\Component\Config\Definition\Builder\NodeDefinition;
-
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;

Tests/Functional/Bundle/FormLoginBundle/DependencyInjection/FormLoginExtension.php

@@ -12,7 +12,6 @@
 namespace Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\FormLoginBundle\DependencyInjection;
 
 use Symfony\Component\DependencyInjection\Reference;
-
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;