modules: add actual, nqptp, and voidauth service modules

modules/services/nqptp.nix

@@ -0,0 +1,27 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}:
+let
+  cfg = config.services.nqptp;
+in
+{
+  options.services.nqptp = {
+    enable = lib.mkEnableOption "nqptp service for shairport-sync";
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.nqptp = {
+      description = "Network Queued PCM Transport Protocol";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = lib.getExe pkgs.nqptp;
+        Restart = "on-failure";
+      };
+    };
+  };
+}