The repositories around the Avahi project were moved to the new Avahi
organisation on GitHub, news item 2023-12-04 on [the Avahi
homepage](https://avahi.org/).
[The nss-mdns homepage](https://0pointer.de/lennart/projects/nss-mdns/)
seems to be outdated so we point to the repository instead, which at
least has an up to date README.
Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
Nssmdns reads the `mdns.allow` configuration file if it is present. By
default it expects the file at `${sysconfdir}/mdns.allow`, sysconfdir
defaults to `${prefix}/etc` and ends up being a path inside the
package's directory in the store.
This makes it impossible to configure nssmdns through this file.
The `bootstrap.sh` script included in the sources passes the same
`--sysconfdir=/etc` as suggested here.
Maybe we should run the script instead? It runs autoreconf so we might
be able to drop the autoreconfHook.
An alternative would be to set `MDNS_ALLOW_FILE`, but sysconfdir is only
used for this file so I suggest leaving this as a simple way for users
of the package to override the location of the file.
Co-authored-by: flokli <flokli@flokli.de>
