SessionInitiator for a specific IdP endpoint

[Cantor, Scott]

> Okay, for the archive, I conclude that multiple DiscoveryResponse
> endpoints are needed at the SP, something like this:

If you don't disable the DS check, yeah, any dedicated initiator would be another DiscoveryResponse to list. Just disabling the check might be simpler, especially for a test, unless this is using the InCommon DS or something.

-- Scott