modified setup.nix so that the proxy functions take cfg

modules/servers/atticd.nix

@@ -31,7 +31,7 @@ in
         };
       };
       nginx.virtualHosts."cache.rotehaare.art" = lib.mkIf cfg.enableProxy (
-        setup.proxyReverseFix cfg.hostName cfg.port // { }
+        setup.proxyReverseFix cfg // { }
       );
     };
   };