Description:
------------
when set CURLOPT_ENCODING "gzip", can't get raw data responsed.

Test script:
---------------
<?php

$url = "https://bugs.php.net/report.php";
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_HEADER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 30);
curl_setopt($curl, CURLOPT_ENCODING, 'gzip, deflate');
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
$responseBody = curl_exec($curl);
$headerArray = curl_getinfo($curl);
if (strlen($responseBody) != $headerArray['size_download'])
{
	printf("error, response data length:%d, download size:%d\n", strlen($responseBody), $headerArray['size_download']);
}


Expected result:
----------------
reuse CURLOPT_BINARYTRANSFER suggest