OAuth Authorization Server Metadata spec addressing IESG feedback

The OAuth Authorization Server Metadata specification has been updated to address feedback received from IESG members. Changes were:

• Revised the transformation between the issuer identifier and the authorization server metadata location to conform to BCP 190, as suggested by Adam Roach.
• Defined the characters allowed in registered metadata names and values, as suggested by Alexey Melnikov.
• Changed to using the RFC 8174 boilerplate instead of the RFC 2119 boilerplate, as suggested by Ben Campbell.
• Acknowledged additional reviewers.

The specification is available at:

• https://tools.ietf.org/html/draft-ietf-oauth-discovery-09

An HTML-formatted version is also available at:

• https://self-issued.info/docs/draft-ietf-oauth-discovery-09.html