There is not much point in installing avahi-dnsconfd in default Fedora installs.
The feature is quite exotic since only very few routers actually implement the
server side for this. Also, all those routers which do implement this also
support DHCP and thus this feature is rather redundant.
It's a nice feature, but kind of superfluous. I say that being Avahi upstream.
It's in the stock avahi package (it's not split out.) So it would require
refactoring the packages.
Note that it's not *enabled* by default, so in the meantime it shouldn't affect
boot speed/memory usage/etc.
I've split this off now, so hopefully it won't be installed by default anymore.