Merge "Add a comment for skipping AAAA queries on linklocal case"

        src_addr->sa_family == AF_INET6) {

        sockaddr_in6* sin6 = reinterpret_cast<sockaddr_in6*>(src_addr);

        if (!allow_v6_linklocal && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {

            // There is no point in sending an AAAA query because the device does not have a global

            // IP address. The only thing that can be affected is the hostname "localhost". Devices

            // with this setting will not be able to get the localhost v6 IP address ::1 via DNS

            // lookups, which is accessible by host local. But it is expected that a DNS server that

            // replies to "localhost" in AAAA should also reply in A. So it shouldn't cause issues.

            // Also, the current behavior will not be changed because hostname “localhost” only gets

            // 127.0.0.1 per etc/hosts configs.

            return 0;

        }

    }