Hi Daniel,
Michael, getting the referer field computed and provided down in the I/O layer sounds really a lot work, it would certainly affect some exposed APIs, I'm not sure we can really add that support without much effort and disruption.
Never mind then, it's not that important. It would still be useful to have support for libcurl built in to libxml2.
Best regards, Michael -- Print XML with Prince! http://www.princexml.com