Add clarification as to source of this file

Add OpenLDAP copyright statement

servers/slapd/back-sql/rdbms_depend/timesten/dnreverse/dnreverse.cpp

+// Copyright 1997-2003 The OpenLDAP Foundation, All Rights Reserved.
+//  COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+
 // (c) Copyright 1999-2001 TimesTen Performance Software. All rights reserved.
 
+// Note: This file was contributed by Sam Drake of TimesTen Performance
+//       Software for use and redistribution as an intregal part OpenLDAP
+//       Software.  -Kdz
+
 #include <stdlib.h>
 
 #include <TTConnectionPool.h>