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diff --git a/contrib/bind9/lib/dns/rbtdb.h b/contrib/bind9/lib/dns/rbtdb.h
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+++ b/contrib/bind9/lib/dns/rbtdb.h
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+/*
+ * Copyright (C) 2004, 2005, 2007, 2011, 2012  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1999-2001  Internet Software Consortium.
+ *
+ * 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.
+ */
+
+/* $Id$ */
+
+#ifndef DNS_RBTDB_H
+#define DNS_RBTDB_H 1
+
+#include <isc/lang.h>
+#include <dns/types.h>
+
+/*****
+ ***** Module Info
+ *****/
+
+/*! \file
+ * \brief
+ * DNS Red-Black Tree DB Implementation
+ */
+
+ISC_LANG_BEGINDECLS
+
+isc_result_t
+dns_rbtdb_create(isc_mem_t *mctx, dns_name_t *base, dns_dbtype_t type,
+		 dns_rdataclass_t rdclass, unsigned int argc, char *argv[],
+		 void *driverarg, dns_db_t **dbp);
+
+/*%<
+ * Create a new database of type "rbt" (or "rbt64").  Called via
+ * dns_db_create(); see documentation for that function for more details.
+ *
+ * If argv[0] is set, it points to a valid memory context to be used for
+ * allocation of heap memory.  Generally this is used for cache databases
+ * only.
+ *
+ * Requires:
+ *
+ * \li argc == 0 or argv[0] is a valid memory context.
+ */
+
+ISC_LANG_ENDDECLS
+
+#endif /* DNS_RBTDB_H */