[dns-wg] Question about use of cname in Google's services

A single query to the Google DNS server does return the CNAME - but it also
gives the results to the CNAME.  Which means, from the single packet reply,
you get back the A or AAAA that you asked for.
Are we really concerned over a few extra bytes?

The fact that Google exposes the CNAME at all is just an implementation
detail; one that has no practical impact to us.  It might have simplified
their serving platform - static DNS entries vs GSLB. But they take the
effort to collapse the answer, and give an actionable response with the
single packet.  No extra round trips.  Much nicer than some other
implementations I've seen for serving both static and GSLB DNS assets.
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