Bug#1035733: debian -policy: packages must not use dpkg-divert to override default systemd configuraton files

[Russ Allbery <rra@debian.org>]

Sean Whitton <spwhitton@spwhitton.name> writes:

> I think what's a bit peculiar here is using "must" for a case where
> there might be package-specific exceptions.  In other cases, Policy uses
> "should" for these cases.  Typically "must" rules are simple and
> completely determinate.

I prefer that too, but in this case, it feels like must is appropriate for
at least systemd configuration files.  And also, just intuitively, I feel
like must is correct when people are using diversions rather than a native
mechanism.  Diversions add weird edge cases and we really shouldn't be
using them lightly.

The wording I proposed and that Luca has now adopted therefore uses must
with a caveat.  Does that sound okay to you?

I think must is too strong for alternatives, where I think there are more
likely to be package-specific exceptions.  But I'd like to take a harder
line on diversions, and I do think that matches how we use diversions
between two Debian packages (work around some weird situation where we
have no better option).

-- 
Russ Allbery (rra@debian.org)              <https://www.eyrie.org/~eagle/>