RE: [xri] OpenID Delegating relationship in XRD

Will Norris wrote on 2009-09-04:
> (this new Extensions wrapper element is necessary to ensure that the
> XRD schema's data model is unambiguous.  You can find the conversation
> thread on the list)

Keep in mind that we should optimize for the common case. If it's going to
be common to put extensions inside Link, it may be simpler to just wrap
KeyInfo in something and solve the ambiguity that way.

-- Scott