Allow the resolv_wrapper to handle NS records

[Richard Sharpe]

On Sat, May 14, 2016 at 10:14 PM, Richard Sharpe
<realrichardsharpe at gmail.com> wrote:
> On Sat, May 14, 2016 at 10:12 PM, Andrew Bartlett <abartlet at samba.org> wrote:
>> On Sat, 2016-05-14 at 21:57 -0700, Richard Sharpe wrote:
>>> Hi folks,
>>>
>>> To actually get net ads dns register working in the self-test
>>> environment, two things are needed:
>>>
>>> 1. We need to add some NS records to the dns_host_file,
>>>
>>> 2. resolve_wrapper needs to return them.
>>>
>>> Attached is a patch to do the second.
>>>
>>> When someone tells me where the first is set up I can fix that as
>>> well.
>>
>> samba_dnsupdate writes to it.
>
> Hmmm, OK. I noticed that code, but wasn't sure.
>
> I will spend more time looking at it.
>
> I am now close to being able to write tests for the net ads dns functionality.

I think I now understand what is going on. selftest/target/Samba4.pm
sets up the Samba4 conf file with a dns update command in it that
contains --all-interfaces and --use-file on the command line, which
causes the DNS stuff to be written to the file specified where
everyone can used it.

So, I have two choices:

1. Hard-code the knowledge that if --use-file is used, an NS record
should be added to the update_list.

2. Add an additional flag --add-ns that causes an NS record to be
written when --use-file is employed.

Any comments?

I prefer the second so that other users of --use-file do not get
unexpected results.

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)