Bug#994275: Reverting breaking changes in debianutils

[Clint Adams]

On Tue, Oct 26, 2021 at 09:53:55PM +0200, Thorsten Glaser wrote:
> “It only exists if it’s in Debian.”
> 
> SCNR. But this is relevant, here.
> 
> [ overly harsh words deleted ]

That's right, so we print a deprecation warning at the beginning
of the development cycle to raise awareness of the situation and
this leads to the interested parties packaging the whiches they
want to see in Debian over the subsequent ~2-year period.

This didn't work for tempfile because everyone still using tempfile
seems to redirect stderr to /dev/null and never saw the warning.

Ironically, it seems it hasn't yet worked for the original catalyst,
but it has worked for GNU which, modulo the problem of the NEW
queue.  As a side effect, it seems to have shined a spotlight on
some broken build systems.