Merge branch '2.2'

* 2.2: (70 commits)
  change wrapped exception message to be more usefull
  updated VERSION for 2.0.23
  update CONTRIBUTORS for 2.0.23
  updated CHANGELOG for 2.0.23
  [Form] fixed failing test
  [DomCrawler] added support for query string with slash
  Fixed invalid file path for hiddeninput.exe on Windows.
  fix xsd definition for strict-requirements
  [WebProfilerBundle] Fixed the toolbar styles to apply them in IE8
  [ClassLoader] fixed heredocs handling
  fixed handling of heredocs
  Add a public modifier to an interface method
  removing xdebug extension
  [HttpRequest] fixes Request::getLanguages() bug
  [HttpCache] added a test (cached content should be kept after purging)
  [DoctrineBridge] Fixed non-utf-8 recognition
  [Security] fixed HttpUtils class tests
  replaced new occurences of 'Request::create()' with '::create()'
  changed sub-requests creation to '::create()'
  fixed merge issue
  ...

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
	src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/toolbar.html.twig
	src/Symfony/Component/DomCrawler/Link.php
	src/Symfony/Component/Translation/Translator.php

Author: fabpot

Encoder/XmlEncoder.php

@@ -287,7 +287,7 @@ private function parseXml($node)
      *
      * @throws UnexpectedValueException
      */
-    private function buildXml($parentNode, $data, $xmlRootNodeName)
+    private function buildXml($parentNode, $data, $xmlRootNodeName = null)
     {
         $append = true;
 
@@ -392,7 +392,7 @@ private function needsCdataWrapping($val)
     private function selectNodeType($node, $val)
     {
         if (is_array($val)) {
-            return $this->buildXml($node, $val, null);
+            return $this->buildXml($node, $val);
         } elseif ($val instanceof \SimpleXMLElement) {
             $child = $this->dom->importNode(dom_import_simplexml($val), true);
             $node->appendChild($child);