PEAR::SOAP WSDL over HTTPS patch

I have replaced the HTTP_Request method of retrieving a WSDL file with a curl version. This removes the dependancy on HTTP::Request in this file, but replaces it with the need for curl to be compiled in to php or loaded as a module. Guess the comment "this section should be replace by curl at some point" can be removed, should you accept the patch. I also added in the column number of where the XML parser trips up (should it trip up), to help in debugging. Patch is attached.