VC HTTP Authorization Conversation

The diversity of our community is a plus. To begin a conversation on VC
access controls, I suggest this short intro to the differences
between OAuth 2.0 and GNAP:

https://www.ietf.org/archive/id/draft-ietf-gnap-core-protocol-05.html#name-compared-to-oauth-20

My goal is to arrive at a shared understanding of what would be minimum
needed to support both OAuth2 and GNAP for securing access to a VC.

- Adrian