nixosTests.agate: switch to using gemget

    geminiserver.wait_for_open_port(1965)

    with subtest("check is serving over gemini"):

      response = geminiserver.succeed("${pkgs.gmni}/bin/gmni -j once -i -N gemini://localhost:1965")

      response = geminiserver.succeed("${pkgs.gemget}/bin/gemget --header -o - gemini://localhost:1965")

      print(response)

      assert "Hello NixOS!" in response

  '';