WIP: router: add configuration for test router

modules/router/ifconfig.nix

@@ -1,5 +1,6 @@
 { config, lib, pkgs, ... }:
 let
+  cfg = config.router;
   vars = import ./vars.nix config;
   links = vars.links;
   ifs = vars.ifs;
@@ -57,7 +58,7 @@ in
   # https://github.com/systemd/systemd/issues/22571
   # https://github.com/systemd/systemd/issues/22571#issuecomment-2094905496
   # https://gist.github.com/csamsel/0f8cca3b2e64d7e4cc47819ec5ba9396
-  networking.dhcpcd.enable = true;
+  networking.dhcpcd.enable = cfg.enableDhcpClient;
   networking.dhcpcd.allowInterfaces = [ ifs.wan.name ];
   networking.dhcpcd.extraConfig = ''
     debug

modules/router/opts.nix

@@ -8,7 +8,13 @@ with lib;
       enableDesktop = mkOption {
         type = types.bool;
         default = false;
-        description = "Enable desktop environment";
+        description = "Enable desktop environment for debugging";
+      };
+
+      enableDhcpClient = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Enable DHCP client (should only be set on the main router)";
       };
 
       wanMAC = mkOption {