cloudflare refers NTS users to wrong page

[Hal Murray]

> links to the NTPsec quickstart page -
> https://docs.ntpsec.org/latest/quick.html
> which only discusses NTP, rather than NTS.
> The correct destination would be
> https://docs.ntpsec.org/latest/NTS-QuickStart.html 

We should have links from each page to the other.

The NTS page should probably start with something like:
  This assumes you are already running  NTPsec.  If not, go here...

The NTP page should probably end with something like:
  Now that you have it running , go here to add NTS support...



-- 
These are my opinions.  I hate spam.