TEST-26-SYSTEMCTL is racy as we call systemctl is-active immediately
after systemctl kill. Let's implement --wait for systemctl kill and
use it in TEST-26-SYSTEMCTL to avoid the race.
In mkosi CI, we want persistent journals when running interactively
and runtime journals when running in CI, so let's add a credential
that allows us to configure which one to use.
Required for integration tests to power off on PID 1 crashes. We
deprecate systemd.crash_reboot and related options by removing them
from the documentation but still parsing them.
Also: rename Handover → Handoff. I think it makes it clearer that this
is not really about handing over any resources, but that the executor is
out off the game from that point on.
To make it easy to have a workable ssh-generator on various distros,
let's optionally generate the ssh privsep dir via tmpfiles.d/ drop-in.
This enables the concept with a path of /run/sshd/ as default. This is
the path Debian/Ubuntu uses, and means that we just work on those
distros. Debian/Ubuntu is the only distro (apparently?) that puts the
privsep dir under /run/, hence always needs the dir to be created
manually. Other distros don't need it that much, because they place the
dir in /usr/ (fedora, best choice!) or /var/ (others, not ideal, because
still mutable).
Also adds a longer explanation about this in NEWS, in the hope that
distro maintaines read that and maybe start cleaning this up.
Alternative to: #31543
Naming is always a matter of preference, and the old name would certainly work,
but I think the new one has the following advantages:
- A verb is better than a noun.
- The name more similar to "the competition", i.e. 'sudo', 'pkexec', 'runas',
'doas', which generally include an action verb.
- The connection between 'systemd-run' and 'run0' is more obvious.
There has been no release yet with the old name, so we can rename without
caring for backwards compatibility.
- mention the version format spec for sytsemd-vpick
- say what "systemd-creds --user" can be used by unprivileged users as well
- say what importctl does
- use en dash instead of em dash
- add a missing article
