Signed-off-by: Otto Moerbeek <otto.moerbeek@open-xchange.com>

Signed-off-by: Remi Gacogne <remi.gacogne@powerdns.com>

For a user who has not read the documentation in detail, if they decide
they want to run more multiple pipe backends, for example, then they
will probably go to the pipe backend documentation to discover how to do
this. The docs list the backend as having support for Multiple
Instances, but no information on how to achieve this. Adding a link to
the launch option immediately provides the information that is required.

Signed-off-by: Roger A. Light <roger@atchoo.org>

Docs: Link backend docs to launch setting

…-meson

dnsdist and rec: Prevent generating release tarballs via autotools