Only Fedora 32+ and opensuse have sysusers support, but handling centos
would require keeping the current commands. For simplicity's sake, let's
not use sysusers yet for rpm.
https://fedoraproject.org/wiki/Changes/Adopting_sysusers.d_format
https://en.opensuse.org/openSUSE:Packaging_guidelines#Users_and_Groups
# remove modules with missing dependencies
rm %{buildroot}%{_libdir}/knot-resolver/kres_modules/etcd.lua
+# remove unused sysusers
+rm %{buildroot}%{_prefix}/lib/sysusers.d/knot-resolver.conf
+
%if 0%{?suse_version}
rm %{buildroot}%{_libdir}/knot-resolver/kres_modules/experimental_dot_auth.lua
rm -r %{buildroot}%{_libdir}/knot-resolver/kres_modules/http