[Ecrit] planned-changes: two questions

[Randall Gellens <[e-mail]>]

I think we're moving to a model where:
- In a query, a client can request to be notified when the location 
should be revalidated;
- In the response, the server provides an ID which the client associates 
with the location it just validated;
- The server sends a notification to the URI, containing the ID;
- The client revalidates each location with which that ID is associated.

Question 1: Does the server delete/inactivate the URI once it has sent 
the notification?

Question 2: Presumably, when the client revalidates the location(s), it 
will again request notification.  Does the server return the same ID as 
before, or a different ID?  A different ID could perhaps be useful in 
edge cases where the server didn't send or the client didn't get the 
notification, but any utility seems small.  If it's the same ID, then 
the answer to question 1 can be that the URI remains active until the 
client asks to no longer be notified (by sending an empty URI?).

--Randall