[rtcweb] Use-case draft updated

[Stefan Hakansson LK <[e-mail]>]

Hi,

as already automatically announced, the use-case draft has been updated. 
Extract from the change log:

* Changed "eavesdropping" to "wiretapping" and referenced RFC2804.

* Removed informal ref webrtc_req; that document has been abandoned by 
the W3C webrtc WG.

* Added use-case where one user is behind a FW that only allows http; 
derived req. F37.
					
* Changed F24 slightly; MUST-> SHOULD, inserted "available".
					
* Added a clause to "Simple video communication service" saying that the 
service provider monitors the quality of service, and derived reqs F38 
and A26.

Most of the above are things that was documented in the minutes of the 
Interim June 12th; I took the liberty to add some text (and reqs 
A26/F38) on the service provider monitoring the QoE.

Feedback and comments are most welcome.

Also, Ekr has the task to deliver an Identity related use-case (as 
discussed at the interim).

Stefan