CAS Shib plugin, how to have shib release CAS released attributes

[Cantor, Scott]

> Because both products support both protocols (for quite some time now), and
> because one can still delegate to a CAS Server but use the SAMLv2 protocol
> instead, Unicon has not extended the Shib-CAS-Authn plugin to support pulling
> attributes out of the CAS response and making them available to the Shib IdP. It
> is not work that seemed to make sense to do.

Yes, I would agree. I probably should close out the task to implement native CAS authentication proxying at this point for similar reasons.

-- Scott