[VarDumper] Support for cURL handler objects.

src/Symfony/Component/VarDumper/Caster/ResourceCaster.php

@@ -20,6 +20,11 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class ResourceCaster
 {
+    /**
+     * @param \CurlHandle|resource $h
+     *
+     * @return array
+     */
     public static function castCurl($h, array $a, Stub $stub, $isNested)
     {
         return curl_getinfo($h);

src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php

@@ -117,7 +117,9 @@ abstract class AbstractCloner implements ClonerInterface
         'DateTimeZone' => ['Symfony\Component\VarDumper\Caster\DateCaster', 'castTimeZone'],
         'DatePeriod' => ['Symfony\Component\VarDumper\Caster\DateCaster', 'castPeriod'],
 
+        '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'],