[dns-operations] Fixing the last Internet protocol which mixes service and server, HTTP (Was: Adding CNAME for the root domain issue

[Stephane Bortzmeyer]

On Wed, Apr 27, 2016 at 06:13:09PM -0700,
 Paul Vixie <paul at redbarn.org> wrote 
 a message of 16 lines which said:

> >I thought the problem with SRV was the multiple round trips?
> 
> i don't think so. both A and AAAA are in-scope for additional data when
> QTYPE=SRV.

Does not help since, today, most delegated domains have no SRV. So,
the browser cannot just send a SRV and hope to receive the A/AAAA as a
bonus in the answer. It needs to send SRV and, if NODATA, send A/AAAA
(awful latency) or to send everything in parallel (happy eyeballs).