Left Over PubSub Stuff?

[EricOnFHIR]

Subscribing.md

Field	Optionality	Type	Description
hub.channel.endpoint	Conditional	string	The WSS URL identifying an existing WebSocket subscription.

^^^ Is hub.channel.endpoint now Required?

a Subscriber MAY modify its subscription by sending a subscription request (hub.mode=subscribe) with a different hub.events value with the same topic and callback/endpoint url, in which case the Hub SHALL replace the subscription’s previous hub.events with the newly provided list of events.

^^^ should callback/endpoint url now be only endpoint url?