While reviewing latest updates; one other issue came up: the draft (re latest 
in Github) currently mentions DNS-SD as a means for a Pledge to discover a Join 
Proxy.
But for DNS-SD discovery I believe a service name is needed; see RFC 6763 
Section 7.  But there’s no service name yet defined for a Join Proxy.

Easiest solution would be to remove the entire DNS-SD sentence and reference.   
I.e. defer this to a future document.

If not removed, we probably need to add a service name registration for 
Constrained Join Proxy such that it can advertise its service and port over 
DNS-SD/mDNS correctly.

(Note: the above is unrelated to my earlier remark on requiring a service name 
for the Registrar’s JPY protocol support. This could also be discovered over 
DNS-SD/mDNS but would need a separate service name.)

Best regards
Esko

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