Description:
------------
When a SOAP header is sent to a webservice which uses SoapServer, a method with the same name as the header is called. However, this only happens when the webservice is document/literal, not when it is rpc/encoded.

Reproduce code:
---------------
<?php
class SoapHandler
{
	function HeaderAuthenticate($header)
	{
		header("X-Debug: header was called");
	}
	
	function login()
	{ }
}

if ($_GET['doclit']) {
	$wsdl = 'doclit.wsdl'; // http://pastebin.com/f7b1434d9
} else {
	$wsdl = 'rpcencoded.wsdl'; // http://pastebin.com/fe989844
}

$handler = new SoapHandler();
$server = new SoapServer($wsdl);
$server->setObject($handler);
$server->handle();
?>

Expected result:
----------------
With both WSDLs, that the HeaderAuthenticate method is called. That is, the X-Debug header contains "header was called" when the HeaderAuthenticate header was sent.

Actual result:
--------------
The HeaderAuthenticate method is only called with document/literal WSDL.