Documentation of Extensions generated by SP Metadata handler

[Peter Schober]

* Tom Scavo <trscavo at gmail.com> [2015-03-06 14:16]:
> In a bilateral arrangement (between SP and IdP), metadata is shared in
> a completely ad hoc fashion so I can't imagine a use for metadata
> extensions in that situation.

Certainly for algorithm support. Maybe less so for request init or DS
response endpoints.
-peter