[dns-operations] new public DNS service: 9.9.9.9

[Stephane Bortzmeyer]

On Thu, Nov 23, 2017 at 03:46:02PM +0200,
 Taras Heichenko <tasic at hostmaster.ua> wrote 
 a message of 25 lines which said:

> If you know folks from quad9 could you send to them this link
> https://www.ripe.net/ripe/mail/archives/ripe-atlas/2017-November/003495.html
> which point to letter that describe weird effect of quad9 work?

There is nothing wrong here and Quad9 has nothing to fix. Using ICMP
to measure the RTT of a DNS server is brittle and yield unexpected
results. If you want to know the RTT of Quad9, send DNS requests.