Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

This reverts commit c8a13555.

Sadly, Borg says this is not a good idea: https://borgbackup.readthedocs.io/en/stable/faq.html#can-i-backup-from-multiple-servers-into-a-single-repository

Spoiler:  This won't work, Borg does not guarantee consistency with
parallel writers to the same repo as I now found out.

It's not really a key, and not really public, but not secret either.
This way, the tests can run.

Older versions of nixpkgs allowed you to specify multiple keys by having
newline separated keys in your string. However, this worked essentially by
accident, and is now explictly disallowed.

I noticed this because I had configured multiple keys for the local grid.  This
isn't currently impacting my ability to work, but it seems like a worthwhile
improvement anyway. This will be necessary (for example) if/when multiple people are
given root access to our storage nodes.

I was about to make a new repository and complicate CI shell scripts to check
it out in the right place at the right time ... but why?

I was about to make a new repository and complicate CI shell scripts to check
it out in the right place at the right time ... but why?