wbclient: fix wbcLookupName with UPN

[Isaac Boukris]

On Thu, Feb 22, 2018 at 3:12 PM, Stefan Metzmacher <metze at samba.org> wrote:
> The attached patch might be a start for this, but I think
> should unify the logic in parse_domain_user() and also pass a namespace
> to it.


btw, while upn handling in parse_domain_user() is currently wrong imo,
parse_wbinfo_domain_user() does it right (though generally
get_winbind_domain() may be better than empty domain).