bug#70588: hash mismatch error and stop fallback

[Ludovic Courtès]

Hi,

Simon Tournier <zimon.toutoune@gmail.com> skribis:

> Other said, hash mismatch should be raised and obviously the content
> must be discarded; then the hash mismatch should be considered as “not
> found” so let try the next strategy for downloading the content.

Agreed.  I merged it with <https://issues.guix.gnu.org/28659>.

Thanks,
Ludo’.