[Samba] Join AD fails DNS update

[Lars Hanke]

>> root at samba:/# nsupdate -D -l
> You need:
> nsupdate -g

oops, missed that option in the man page.

Yes, using nsupdate -g and a valid TGT I could add my samba4 record to 
the DNS - which seems to answer all your following questions.

Thanks, this may prove valuable for all further investigation.

I'd love this -D verbosity on named syslogs. This would help to figure 
out, what samba actually sends. I'll experiment with the '-d' option 
tonight.

Thanks,
  - lars.