Description:
------------
Trying to set response headers using the Yaf_Response_Http->setHeader() does not set the header on the object.


Currently using yaf 2.9.9 -> a previous bug report states that this should have been fixed in 2.2?!

Test script:
---------------
class HomeController extends Yaf_Controller_Abstract {
  public function indexAction() {
    $response = $this->getResponse();
    $response->setHeader('Content-Type', 'text/html; charset=utf-8');
    $response->setBody('hello world');
    die('<pre>' . print_r($response, true) . '</pre>');
}

Expected result:
----------------
Yaf_Response_Http Object
(
    [_header:protected] => Array
        (
            [Content-Type] => text/html; charset=utf-8
        )

    [_body:protected] => Array
        (
            [content] => hello world
        )

    [_sendheader:protected] => 1
    [_response_code:protected] => 200
)

Actual result:
--------------
Yaf_Response_Http Object
(
    [_header:protected] => Array
        (
        )

    [_body:protected] => Array
        (
            [content] => hello world
        )

    [_sendheader:protected] => 1
    [_response_code:protected] => 200
)