improvements in networking

- macvtaps working
- only 1 dnsmasq service per namespace
- vms binds to networking services
- lans with domains
- vms no longer assigned same ip (machine id issues)
-

nixos/network/options.nix

@@ -97,6 +97,12 @@ with vmixLib.network;
 
     lans = mkOption {
       type = types.attrsOf (types.submodule {
+        options.domain = mkOption {
+          type = types.nullOr types.str;
+          default = null;
+          description = "Domain name for the hosts of this lan.";
+        };
+
         options.ipv4 = {
           range = mkOption {
             type = types.strMatching regex.cidr4;