Bug#930428: debootstrap should ensure matching _apt uid

[Ansgar Burchardt <ansgar@43-1.org>]

Philipp Kern writes:
> 20/06/2019 20:22, Ansgar Burchardt wrote:
>> You look up which uid the _apt user inside the chroot has and use that.
>
> Yeah, but that scales poorly if you have a centralized firewall
> policy. It means that you need to maintain dynamic rules. I know it's
> possible and you can dedicate a chain to it. At the same time I think
> this problem is actually common enough that it deserves a solution.

If _apt deserves a special solution, I would suggest assigning the _apt
user a static uid instead of patching debootstrap.

Ansgar