Bug#985616: Document change to unbound ".d" config file fragment behavior

[Justin B Rye <justin.byam.rye@gmail.com>]

Andrei POPESCU wrote:
> The NEWS file is also available online:
> 
> https://sources.debian.org/src/unbound/1.13.1-1/debian/NEWS/

That's a better idea than the alternative I was considering, which was
to point at this bug report.  So we could cut it all the way down to
something like:

  <section id="unbound-config-file-handling">
    <title>Config file fragment handling in unbound</title>
    <para>
      The DNS resolver <systemitem role="package">unbound</systemitem>
      has changed the way it handles configuration file fragments. If
      you are relying on an <literal>include:</literal> directive to
      merge several fragments into a valid configuration, you should
      read <ulink
      url="https://sources.debian.org/src/unbound/1.13.1-1/debian/NEWS/";>the
      NEWS file</ulink>.
    </para>
  </section>

-- 
JBR	with qualifications in linguistics, experience as a Debian
	sysadmin, and probably no clue about this particular package