Reverts #344407
This has broken nixos-rebuild switch so that it no longer updates the profile, which has bad consequences including not updating the systemd-boot menu with new generations.
bitcoind v28 made a breaking change that affects lnd. This setting
reverts bitcoind to old behavior until lnd is updated to be compatible
with bitcoind v28.
There is a nasty race condition in the cups tests.
To understand what is going on, one must first note that
printers are installed in the vms with ensure-printers.service,
which is started as part of multi-user.target.
ensure-printers.service in turn triggers a start of
cups.service as it needs to connect to the local cups daemon.
This is what happens when the test runs:
1 the test waits for cups.socket or cups.service to start up
(subtest "Make sure that cups is up on both sides...")
2 after cups.service started
(it starts even in the "socket" case,
triggered by ensure-printers.service),
ensure-printers.service is started
3 the test tries to connect to the cups daemons via curl
(subtest "HTTP server is available too")
4 the test verifies the required printers are installed
("lpstat -a" called by subtest "LP status checks")
Usually, 3 needs some time, so ensure-printers.service
already installed all printers that are required by 4.
But if 3 is too fast, or if ensure-printers.service is too slow,
4 fails to find the printers it is looking for.
One can provoke the problem by adding
> systemd.services.ensure-printers.serviceConfig.ExecStartPre = "/run/current-system/sw/bin/sleep 10";
to the `nodes.client` configuration.
The commit at hand fixes the problem by changing 1:
Instead of waiting for cups,
it now waits for ensure-printers.service
(which in turn waits for cups.service and cups.socket).
This is also in accordance with the
subtest description in the code that promises to
"Make sure that cups is up [...] and printers are set up".
Prior to this contribution, every boot with a default configuration was
considered `ConditionFirstBoot=true` by systemd, since /etc/machine-id
was not commited to disk.
This also extends the systemd with a check for subsequent boots not
being considered first boots.
