ed: clarify the usage of response uri with response mode direct_post

[Sakurann]

resolves #93.

cc @javereec

[awoie]

Looks good but I had one question and I just want to make sure we are not missing anything.

[selfissued]

I agree with @peppelinux's proposed change.

[peppelinux]

I approve this PR

Probably, in another PR, we should say something about the value of configuring client_id_scheme differently

it turns out that redirect_uri refers to a "direct trust model"

therefore, as mentioned in other issues, the client_id_scheme parameter is not related about how to interpret the the client id value but to the trust evaluation mechanism to attest the client identity

[peppelinux]

Do we suppose to resolve the issue #33 too using this PR?

[jogu]

Do we suppose to resolve the issue #33 too using this PR?

I think for simplicity we should keep that in a separate PR, as this one is hopefully very close to being merged now.

[selfissued]

I withdraw my request for changes.

Github didn't remove this for some reason, dismissing as Mike has withdrawn it as per his 15th July comment

[javereec]

I approve this PR

[jogu]

I think we're close on this one - there is one comment from Oliver that needs addressed somehow, and there's some conflicts, but I'm happy to fix the conflicts once we have resolution on Oliver's comment.