source: vendor/3.6.0/examples/bind9-patches/0001-leave-the-question-section-in-update-responses.patch

From 1d97835f07fd5142187629941422f87b33015414 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Wed, 17 Feb 2010 10:47:59 +1100
Subject: [PATCH 1/5] leave the question section in update responses.

This fixes TSIG-GSS updates from windows7 and w2k8r2, which require
the question to be included in the initial refusal for the unsigned
update.
---
 lib/dns/message.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/lib/dns/message.c b/lib/dns/message.c
index b541635..ae4965f 100644
--- a/lib/dns/message.c
+++ b/lib/dns/message.c
@@ -2474,7 +2474,8 @@ dns_message_reply(dns_message_t *msg, isc_boolean_t want_question_section) {
        if (!msg->header_ok)
                return (DNS_R_FORMERR);
        if (msg->opcode != dns_opcode_query &&
-           msg->opcode != dns_opcode_notify)
+           msg->opcode != dns_opcode_notify &&
+           msg->opcode != dns_opcode_update)
                want_question_section = ISC_FALSE;
        if (want_question_section) {
                if (!msg->question_ok)
--
1.6.3.3