Merge branch '2.3' into 2.7

* 2.3:
  [HttpFoundation] Fix transient test
  [HttpFoundation] Add a dependency on the mbstring polyfill
  add readme files where missing
  Don't use reflections when possible
  [Form] Update form tests after the ICU data update
  [Intl] Update tests and the number formatter to match behaviour of the intl extension
  [Intl] Update the ICU data to version 55
  [Intl] Fix the update-data.php script in preparation for ICU 5.5
  Use constant instead of function call.
  fixed test name
  automatically generate safe fallback filename

Conflicts:
	src/Symfony/Component/Debug/Debug.php
	src/Symfony/Component/HttpFoundation/composer.json
	src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php

Author: nicolas-grekas

composer.json

@@ -20,6 +20,7 @@
         "doctrine/common": "~2.4",
         "paragonie/random_compat": "~1.0",
         "symfony/polyfill-apcu": "~1.1",
+        "symfony/polyfill-mbstring": "~1.1",
         "twig/twig": "~1.23|~2.0",
         "psr/log": "~1.0"
     },

src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypeTest.php

@@ -796,7 +796,7 @@ public function testChoicesForValuesOptimization()
 
         $this->persist(array($entity1, $entity2));
 
-        $field = $this->factory->createNamed('name', 'Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
+        $field = $this->factory->createNamed('name', 'entity', null, array(
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',

src/Symfony/Bridge/Swiftmailer/README.md

@@ -0,0 +1,13 @@
+Swiftmailer Bridge
+==================
+
+Provides integration for [Swiftmailer](http://swiftmailer.org/) into the
+Symfony web development toolbar.
+
+Resources
+---------
+
+  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+  * [Report issues](https://github.com/symfony/symfony/issues) and
+    [send Pull Requests](https://github.com/symfony/symfony/pulls)
+    in the [main Symfony repository](https://github.com/symfony/symfony)

src/Symfony/Bundle/FrameworkBundle/README.md

@@ -0,0 +1,10 @@
+FrameworkBundle
+===============
+
+Resources
+---------
+
+  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+  * [Report issues](https://github.com/symfony/symfony/issues) and
+    [send Pull Requests](https://github.com/symfony/symfony/pulls)
+    in the [main Symfony repository](https://github.com/symfony/symfony)

src/Symfony/Bundle/SecurityBundle/README.md

@@ -0,0 +1,10 @@
+SecurityBundle
+==============
+
+Resources
+---------
+
+  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+  * [Report issues](https://github.com/symfony/symfony/issues) and
+    [send Pull Requests](https://github.com/symfony/symfony/pulls)
+    in the [main Symfony repository](https://github.com/symfony/symfony)

src/Symfony/Bundle/TwigBundle/README.md

@@ -0,0 +1,10 @@
+TwigBundle
+==========
+
+Resources
+---------
+
+  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+  * [Report issues](https://github.com/symfony/symfony/issues) and
+    [send Pull Requests](https://github.com/symfony/symfony/pulls)
+    in the [main Symfony repository](https://github.com/symfony/symfony)

src/Symfony/Bundle/WebProfilerBundle/README.md

@@ -0,0 +1,10 @@
+WebProfilerBundle
+=================
+
+Resources
+---------
+
+  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+  * [Report issues](https://github.com/symfony/symfony/issues) and
+    [send Pull Requests](https://github.com/symfony/symfony/pulls)
+    in the [main Symfony repository](https://github.com/symfony/symfony)

src/Symfony/Component/Debug/Debug.php

@@ -45,7 +45,7 @@ public static function enable($errorReportingLevel = null, $displayErrors = true
             error_reporting(-1);
         }
 
-        if ('cli' !== php_sapi_name()) {
+        if ('cli' !== PHP_SAPI) {
             ini_set('display_errors', 0);
             ExceptionHandler::register();
         } elseif ($displayErrors && (!ini_get('log_errors') || ini_get('error_log'))) {

src/Symfony/Component/DependencyInjection/Container.php

@@ -356,9 +356,8 @@ public function initialized($id)
     public function getServiceIds()
     {
         $ids = array();
-        $r = new \ReflectionClass($this);
-        foreach ($r->getMethods() as $method) {
-            if (preg_match('/^get(.+)Service$/', $method->name, $match)) {
+        foreach (get_class_methods($this) as $method) {
+            if (preg_match('/^get(.+)Service$/', $method, $match)) {
                 $ids[] = self::underscore($match[1]);
             }
         }

src/Symfony/Component/Filesystem/Tests/FilesystemTest.php

@@ -156,7 +156,7 @@ public function testCopyCreatesTargetDirectoryIfItDoesNotExist()
         $this->assertEquals('SOURCE FILE', file_get_contents($targetFilePath));
     }
 
-    public function testCopyForOriginUrlsAndExistingLocalFileDefaultsToNotCopy()
+    public function testCopyForOriginUrlsAndExistingLocalFileDefaultsToCopy()
     {
         $sourceFilePath = 'http://symfony.com/images/common/logo/logo_symfony_header.png';
         $targetFilePath = $this->workspace.DIRECTORY_SEPARATOR.'copy_target_file';