Net::OpenID::URIFetch - fetch and cache content from HTTP URLs

This is roughly based on Ben Trott's URI::Fetch module, but URI::Fetch doesn't cache enough headers that Yadis can be implemented with it, so this is a lame copy altered to allow Yadis support.

Hopefully one day URI::Fetch can be modified to do what we need and this can go away.

This module is tailored to the needs of Net::OpenID::Consumer and probably isn't much use outside of it. See URI::Fetch for a more general module.