I think the lookup_pdc_name() should be called lookup_dc_name() and the

I think the lookup_pdc_name() should be called lookup_dc_name() and the
name_status_find() call here should look up a #1c name instead of #1d.
This fixes some bugs currently with BDC authentication in winbindd and in
smbd as you can't query the #1d name with the ip address of a BDC.

Who is Uncle Tom Cobbley anyway?
(This used to be commit 4215048f7b20a8f9e5877bdbb2f54841b2f7fa64)