Function use in the IdP

[Rod Widdowson]

> The real question is: do we want to do all of that?  I had in the back
> of my mind that we might not necessarily expose all the advanced stuff
> via the custom schemas.  If someone wants to do advanced, they switch
> to Spring native config for that.  We do still support that for the
> metadata stuff, don't we? Or am I mis-remembering?

That's a good point.  I should take as a work item the challenge to build a
Metadata-resolver.xml which is written entirely in Spring-bean speak.

If we can (and we should be able to) do that I revoke my question about
adding extra filter types.

Rod