New working ia64 installer images available

Hi!

Today's installer images for ia64 [1] include a fix for GRUB so that the
images are finally bootable again. Since the 5.10 kernel in use already
contains a lot of ia64 fixes, it will work on many ia64 machines already
except for larger machines like the RX2800 which require at least kernel
5.12.

Since Debian unstable is currently effectively frozen due to testing being
frozen for the imminent release, the kernel package in Debian unstable is
currently stuck at version 5.10 until Debian Bullseye is released which
should happen within the next weeks [2].

So while installing on RX2800 and similar machines currently does not work
yet, most smaller ia64 machines should work and I would therefore like to
get some installation reports for ia64 with today's images.

Thanks,
Adrian

> [1] https://cdimage.debian.org/cdimage/ports/snapshots/2021-04-17/
> [2] https://lists.debian.org/debian-release/2021/04/msg00187.html