system/checkconf/bad-inline-slave.conf

/*
 * Copyright (C) 2013, 2016  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

 /*
  * An inline-signing slave should be forced to have a file option
  */

  zone "." {
      type slave;
      inline-signing yes;
      masters { 10.53.0.1; };
  };