tdbsam as default passdb backend in 3.4

[Björn Jacke]

Hi,

I know most people here liked the idea to change the default for passwd backend
to tdbsam for quite a while. I think 3.4 is a good occasion to make a change
like this finally happen.

If you endorse this change, you can simply review + on
https://bugzilla.samba.org/show_bug.cgi?id=6406 .

Cheers
Björn