Merge branch '3.4' into 4.4

* 3.4:
  Fixed typo in test name
  [HttpFondation] Change file extension of "audio/mpeg" from "mpga" to "mp3"
  [VarDumper] Support for cURL handler objects.
  [DI][FrameworkBundle] Remove whitelist occurrences
  Avoid accessibility errors on debug toolbar

Author: fabpot

Caster/ResourceCaster.php

@@ -22,6 +22,11 @@
  */
 class ResourceCaster
 {
+    /**
+     * @param \CurlHandle|resource $h
+     *
+     * @return array
+     */
     public static function castCurl($h, array $a, Stub $stub, $isNested)
     {
         return curl_getinfo($h);

Cloner/AbstractCloner.php

@@ -144,7 +144,9 @@ abstract class AbstractCloner implements ClonerInterface
         'Ds\Pair' => ['Symfony\Component\VarDumper\Caster\DsCaster', 'castPair'],
         'Symfony\Component\VarDumper\Caster\DsPairStub' => ['Symfony\Component\VarDumper\Caster\DsCaster', 'castPairStub'],
 
+        'CurlHandle' => ['Symfony\Component\VarDumper\Caster\ResourceCaster', 'castCurl'],
         ':curl' => ['Symfony\Component\VarDumper\Caster\ResourceCaster', 'castCurl'],
+
         ':dba' => ['Symfony\Component\VarDumper\Caster\ResourceCaster', 'castDba'],
         ':dba persistent' => ['Symfony\Component\VarDumper\Caster\ResourceCaster', 'castDba'],
         ':gd' => ['Symfony\Component\VarDumper\Caster\ResourceCaster', 'castGd'],