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php curl auth found http://stackoverflow.com/questions/2140419/how-do-i-make-a-request-using-http-basic-authentication-with-php-curl/2140445#2140445 and http://wiki.uniformserver.com/index.php/PHP_cURL:_Authentication which seem relevant

FWIW, the op is Crossposted at http://stackoverflow.com/questions/25179697/curl-to-perl-fcgi-script. I cross-linked this cross-postings for maximum collaboration efficiency