Rather than using an ad-hoc configuration on my new machines, upstream
this here. Eventually I might push this to Nixpkgs if I work out the
tests and integration with the scripted variant, or if someone else
matrix-appservice-irc: Add NixOS module
Inspired by, but not a copy of, github:NixOS/nixpkgs#95854.
trust-dns: init at 0.19.5
Split packages and modules off nixos-configurations
This will allow me to make them public while keeping the NixOS
Some reorganization was made to 1) be compatible with NUR, even though
I don't currently use it; and 2) mirror the nixpkgs taxonomy, to more
easily move packages upstream later on.
All package and NixOS module expressions were taken from