update key checks in lib/bind9/check.c and fix checkconf test

- any use of trusted or static keys for the root zone will now
  elicit a warning, regardless of what the keys may be
- ditto for any use of a key for dlv.isc.org, static or managed

bin/tests/system/checkconf/check-root-static-key.conf

@@ -0,0 +1,27 @@
+/*
+ * 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.
+ */
+
+managed-keys {
+	# This key (20326) was published in the root zone in 2017.
+	# Servers which were already using the old key (19036) should
+	# roll seamlessly to this new one via RFC 5011 rollover. Servers
+	# being set up for the first time can use the contents of this
+	# file as initializing keys; thereafter, the keys in the
+	# managed key database will be trusted and maintained
+	# automatically.
+	. static-key 257 3 8 "AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3
+		+/4RgWOq7HrxRixHlFlExOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kv
+		ArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgCmr3EgVLrjyBxWezF
+		0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+e
+		oZG+SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfd
+		RUfhHdY6+cn8HFRm+2hM8AnXGXws9555KrUB5qihylGa8subX2Nn6UwN
+		R1AkUTV74bU=";
+};