[Samba] winbind is not taking default domain

[Christian PERRIER]

Quoting Marco Huang (marco.huang at auckland.ac.nz):
> Hi,
> 
> We have been running samba file server about 2 years without this problem. The problem appeared at the same time on our debian and centos servers. Not sure if it's related to any updates on our windows AD servers.

This seems to be Debian bug #617449, which I forwarded upstream as
#7999. I write "seems" as the bug submitter in Debian was using
"winbind separator" and you aren't.