Attribute Query: request for specific attributes

[Cantor, Scott]

> Yes, looks like you added support for Attribute *name* filtering - but not
> *value* filtering - in 2.4.0.
> 
> https://issues.shibboleth.net/jira/browse/SIDP-559

Ok. I believe at one point the IdP silently ignored them, so I probably initially patched in a warning and errored it out, which is required by SAML, and then implemented it as best I could at the time.

> By my read, v3 seems to support both name and value filtering, via the flow
> action FilterByQueriedAttributes.

Probably just string valued, or string-like.

-- Scott