Registration & Discovery - Add Terms of service URL by the server to the registering client_id

[Nat Sakimura]

When the client registers to the server, there will be a TOS of the server to the client, and if the client cannot accept it, it should not further connect.

This TOS URL should be available in the Registration response, but there is not.

Similarly, there should be a privacy policy.

In short, we need to provide the following RFC5988/IANA Link Relations repository items.

• privacy-policy
• terms-of-service

[John Bradley]

The Privacy Policy and TOS we were talking about were for the discovery document.

They are what the client needs to agree to when registering.

[Michael Jones]

We decided to add optional op_policy_url and op_tos_url parameters to discovery.

[Michael Jones]

Fixed #772 - Added "op_policy_url" and "op_tos_url"

→ <<cset 8b37b4f17abd>>