deb822 sources for Trixie/Hurd

[Martin-Éric Racine <martin-eric.racine@iki.fi>]

Greetings,

Since Trixie is already under freeze, we should probably migrate
crosshurd and the install CD to deb822. What I have so far:

--------
$ more /etc/apt/sources.list.d/debian.sources
Types: deb deb-src
URIs: https://deb.debian.org/debian-ports/
Suites: unreleased
Components: main
Signed-By: /usr/share/keyrings/debian-ports-archive-keyring.gpg

Types: deb
URIs: https://deb.debian.org/debian-ports/
Suites: unstable
Components: main
Signed-By: /usr/share/keyrings/debian-ports-archive-keyring.gpg

Types: deb deb-src
URIs: https://deb.debian.org/debian/
Suites: unstable
Components: main
Architectures: all
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
--------

In principle, content is also available for the contrib, non-free and
non-free-firmware components, but can we actually utilize any of this
on Hurd? Most of all, can we even load the firmware blobs?

Martin-Éric