Merge branch '2.8'

* 2.8: (100 commits)
  [DependencyInjection] provide better error message when using deprecated configuration options
  [console][TableCell] get cell width without decoration.
  Improve the config validation in TwigBundle
  [VarDumper] Changed tooltip to expand-all keybinding in OS X
  [Bridge\PhpUnit] Fix composer installed phpunit detection
  [VarDumper] Fix generic casters calling order
  [2.7][SecurityBundle] Remove SecurityContext from Compile
  [WebProfilerBundle][logger] added missing deprecation message.
  Fix profiler CSS
  [Security][Acl] enforce string identifiers
  [FrameworkBundle] make `templating.helper.router` service available again for BC reasons
  [BrowserKit] Fix bug when uri starts with http.
  bumped Symfony version to 2.7.1
  updated VERSION for 2.7.0
  updated CHANGELOG for 2.7.0
  bumped Symfony version to 2.6.10
  updated VERSION for 2.6.9
  updated CHANGELOG for 2.6.9
  fixed tests
  bumped Symfony version to 2.3.31
  ...

Conflicts:
	CHANGELOG-2.3.md
	CHANGELOG-2.6.md
	CHANGELOG-2.7.md
	UPGRADE-2.7.md
	UPGRADE-3.0.md
	src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php
	src/Symfony/Bridge/Twig/Extension/AssetExtension.php
	src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
	src/Symfony/Bridge/Twig/composer.json
	src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
	src/Symfony/Bundle/FrameworkBundle/Resources/config/templating.xml
	src/Symfony/Bundle/FrameworkBundle/Resources/config/templating_php.xml
	src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
	src/Symfony/Bundle/FrameworkBundle/composer.json
	src/Symfony/Bundle/SecurityBundle/composer.json
	src/Symfony/Component/Debug/ExceptionHandler.php
	src/Symfony/Component/DependencyInjection/Container.php
	src/Symfony/Component/DependencyInjection/Definition.php
	src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
	src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
	src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/legacy-services6.xml
	src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services6.xml
	src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/legacy-services6.yml
	src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services6.yml
	src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
	src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
	src/Symfony/Component/Form/CHANGELOG.md
	src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php
	src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ContainerAwareHttpKernelTest.php
	src/Symfony/Component/Routing/Loader/XmlFileLoader.php
	src/Symfony/Component/Routing/Loader/YamlFileLoader.php

Tests/PhpExecutableFinderTest.php

@@ -91,7 +91,7 @@ public function testFindWithSuffix()
         //TODO maybe php executable is custom or even Windows
         if ('\\' === DIRECTORY_SEPARATOR) {
             $this->assertTrue(is_executable($current));
-            $this->assertTrue((bool) preg_match('/'.addSlashes(DIRECTORY_SEPARATOR).'php\.(exe|bat|cmd|com)$/i', $current), '::find() returns the executable PHP with suffixes');
+            $this->assertTrue((bool) preg_match('/'.addslashes(DIRECTORY_SEPARATOR).'php\.(exe|bat|cmd|com)$/i', $current), '::find() returns the executable PHP with suffixes');
         }
     }
 }