add a sample dvmrpd.conf

ok deraadt@

src/etc/dvmrpd.conf

@@ -0,0 +1,17 @@
+#	$OpenBSD: dvmrpd.conf,v 1.1 2006/06/01 16:38:08 norby Exp $
+
+# macros
+#fast="10"
+
+# global configuration
+#mfc-update no
+
+group {
+	robustness 4
+
+	interface bge0
+	interface vlan5
+	interface vlan6
+	interface gre0
+}
+