Now that Debian 11 LTS has reached end-of-life as announced in
<https://lists.debian.org/debian-announce/2026/msg00008.html>, no more bullseye
security updates will be issued, so this seems like a good time to archive
bullseye-security onto archive.debian.org.

Normally there is a delay between a release reaching EOL and that release
being moved onto archive.debian.org, but the copy of bullseye-security
on deb.debian.org and security.debian.org is currently broken
(dists/ seems correct but files are missing from the pool/, see
<https://bugs.debian.org/1147093>) so doing the move onto archive.debian.org
sooner rather than later would mean that things like the debian/eol:bullseye
Docker image can have a source for the final state of bullseye-security.

My interest in this is that older branches of the Steam Runtime are
based on Debian 11 packages, as a way to build binaries that will run
successfully on even very old LTS host distributions like Ubuntu 22.04
and Linux Mint 22.x.

Thanks,
    smcv