osm2pgsql "vendors" (i.e. contains in its own repo the source of) two libraries we have in NixPkgs and would build against and use these bundled versions by default:

• libosmium
• protozero

These changes makes osm2pgsql compile against and use the respective libraries from NixPkgs instead. Further, I'm adding myself as an additional maintainer.

Motivation for this change

This avoids having to build libosmium and protozero as part of osm2pgsql when already-built store paths can be used instead.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

Result of nixpkgs-review 1