Clarifies the authentication-authorization section as non-normative and encouraging Solid Protocol's mechanisms for authentication and authorization.
The requirement on server-subscription-access-controls is removed since it is either redundant or potentially conflicting with Solid Protocol's or elsewhere where the Notification Protocol may be used alongside.
This PR should be merged after https://github.com/solid/notifications/pull/99 - the requirement on server-subscription-access-read prohibits a category of use cases.
Clarifies the authentication-authorization section as non-normative and encouraging Solid Protocol's mechanisms for authentication and authorization.
The requirement on server-subscription-access-controls is removed since it is either redundant or potentially conflicting with Solid Protocol's or elsewhere where the Notification Protocol may be used alongside.