4405. [bug] Change 4342 introduced a regression where you could

not remove a delegation in a NSEC3 signed zone using
                        OPTOUT via nsupdate. [RT #42702]

(cherry picked from commit d811a7d9ef)

bin/tests/system/nsupdate/ns3/named.conf

@@ -59,3 +59,9 @@ zone "many.test" {
 	allow-update-forwarding { any; };
 	file "many.test.bk";
 };
+
+zone "delegation.test" {
+	type master;
+	allow-update { any; };
+	file "delegation.test.db.signed";
+};