avahi service: add reflector option

nixos/modules/services/networking/avahi-daemon.nix

@@ -33,6 +33,9 @@ let
     publish-hinfo=${yesNo publish.hinfo}
     publish-workstation=${yesNo publish.workstation}
     publish-domain=${yesNo publish.domain}
+
+    [reflector]
+    enable-reflector=${yesNo reflector}
   '';
 
 in
@@ -113,6 +116,11 @@ in
         description = ''Whether to enable wide-area service discovery.'';
       };
 
+      reflector = mkOption {
+        default = false;
+        description = ''Reflect incoming mDNS requests to all allowed network interfaces.'';
+      };
+
       publish = {
         enable = mkOption {
           default = false;