Integrate MCR input about the SNI section

[thomas-fossati]

From MCR review

   3) While section 10 on SNI does not say *how* to use DoH or DPRIVE to provide
   for confidentiality of names that are looked up, a naive use of DoH with
   Google/Cloudflare/etc. by IoT devices would be a problem for almost all
   enterprises that wish to filter the DNS used by IoT devices, and to use
   DNS canaries to identify malware.

Given that such an involved discussion is not in scope for this document,
it might be better just to refer to the ADD WG without mentioning specific
solutions.
I am, in general, not convinced that encrypted SNI serves any purpose for
most IoT devices.

[mcr]

@mcr bread crumbs.

[OR13]

Seems like a reference, and text adjustment might close this issue.

[hannestschofenig]

-- addressed in version -07