Description:
------------
The local_cert option in SoapClient does not understand relative 
paths on windows machines. While it does on Linux machines. Sorry i 
cannot provide any actual credentials to test this.

Reproduce code:
---------------
$soapclient_opts = array(
	'local_cert' => 'some\relative\path\cert.pem',
);

$SoapClient = new SoapClient('some\relative\wsdl.xml', $soapclient_opts);

try {
	
    $request = new SoapVar($some_xml_request, XSD_ANYXML);
	
    $SoapClient->__soapCall('someFunc', array($request));
	
} catch(SoapFault $e) {
    print_r($e);
}


Expected result:
----------------
One would expect that SoapClient would connect to the webservice and 
call the required function or if the relative path is not allowed to 
pass the soapclient should throw and error saying exactly that. 

Actual result:
--------------
An exception is thrown which says "Could not connect to host." If you 
pass an absolute path to the local_cert everything works fine.