Description:
------------
Using the SoapClient class to talk to SOAP services provided by MSSQL server configured with Digest authorization fails if the server specifies that the MD5-sess algorithm be used

Reproduce code:
---------------
// reproduction requires an MSSQL server configured with 
// SOAP services and protected with Digest authorization
// Prior to testing, verify the Digest support by making a
// a request with a third party tool like cURL

$options=array(
'trace'      => 1,					
'authentication' => SOAP_AUTHENTICATION_DIGEST,
'login'=> $user, 
'password'=>$pass
);
  			
$client = new SoapClient($wsdlfile, $options);  
			
$client->Foo(); 

Expected result:
----------------
Expect SOAP call 'Foo' to succeed

Actual result:
--------------
SoapFault exception is thrown with the message "Unauthorized"

$client->__getLastRequestHeaders() returns

POST /ept/cv HTTP/1.1
Host: 168.143.179.36
Connection: Keep-Alive
User-Agent: PHP-SOAP/5.2.6-1ubuntu4
Content-Type: text/xml; charset=utf-8
SOAPAction: "ASP.EPT.CVListTerms"
Content-Length: 393
Authorization: Digest username="admin8", realm="Digest", nonce="987675a1c136c901ec4171a06bd402000eb60bf1fd307a9faf41324273b0872d8b56905071490005", uri="/ept/cv", qop="auth", nc="00000001", cnonce="4942e49e", response="3ee12e732e2e04a50c23ffd910164cb8"



$client->__getLastResponseHeaders() returns this:

HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest qop="auth",algorithm=MD5-sess,nonce="857594a1c136c90161f301be706f9f1e5a4146c3d7a1bf3b63a6b8b14dea6b3afcc195ff8d1fce37",charset=utf-8,realm="Digest"
Server: Microsoft-SQL/9.0 Microsoft-HTTPAPI/1.0
Date: Sat, 25 Oct 2008 16:49:21 GMT
Connection: close