[master] forbid inline-signing slave with no file

3491.	[bug]		Slave zones using inline-signing must specify a
			file name. [RT #31946]

bin/tests/system/checkconf/bad-inline-slave.conf

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2005, 2007, 2010-2012  Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+ /*
+  * An inline-signing slave should be forced to have a file option
+  */
+  
+  zone "." {
+          type slave;
+          inline-signing yes;
+          masters { 10.53.0.1; };
+  };