Bug#959909: debian-policy: complete implementation of ctte decision to forbid vendor-specific series files

[Graham Inggs <ginggs@debian.org>]

On Wed, 06 May 2020 13:28:53 -0700, Sean Whitton wrote:
> Quoting from #904302:
>
> > The Committee therefore resolves that:
> >
> > 1. Any use of dpkg's vendor-specific patch series feature is a bug for
> >    packages in the Debian archive (including contrib and non-free).
> >
> >    This should be implemented in Debian Policy by declaring that a
> >    package SHOULD NOT contain a non-default series file.
> >
> > 2. After Buster is released, use of the vendor-specific patch series
> >    feature is forbidden in the Debian archive.
> >
> >    This should be implemented in Debian Policy by declaring that a
> >    package MUST NOT contain a non-default series file.
>
> Here is a patch to finish implementing this; I am seeking seconds:

Seconded.