read DS trust anchors in named.conf

(but they aren't used for anything yet)

bin/tests/system/checkconf/bad-static-initial-1.conf

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 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/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+dnssec-keys {
+	example. initial-ds 60724 5 1 "D74CF845955A0DFE604AF215E948E67D2EA94FF3";
+	example. static-ds 60724 5 2 "29E79B9064EE1A11DF3BFF19581DDFED7952C22CC204ACE17B6007EB1437E9E6";
+};