Description:
------------
when using the local_cert/passphrase options to soapclient() soapclient will not use the https cert specified with local_cert to connect to the server that contains the wsdl file (it will however use it when making the actual soap request). I understand that this may not always be needed, but their should be no reason that a wsdl file need to be public, so maybe there could be an option to use the local_cert/passphrase when fetching the wsdl (and automatically disable wsdl cache for those urls if need be [not sure if you guys consider that a security issue])

Reproduce code:
---------------
$mailer = new SoapClient(EMAIL_ACCESS_URL, array('classmap', $wsdl_classmap, 'local_cert' => EMAIL_HTTPS_CERT,'passphrase' => EMAIL_CERT_PASS));


Expected result:
----------------
not throw an error

Actual result:
--------------
throws error saying it cannot parse the wsdl...which is very misleading, it mentions about errors fetching the file

Note: It can be worked around by fetching it with curl and writing to a temp file and using that to construct the SoapClient() object