Using the example before this commit resulted in the following error:
```
error: value is a string while a list was expected, at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/services/misc/nix-daemon.nix:349:37
```
* Sync systemd units with upstream. Upstream uses SIGUSR2 instead of SIGHUP
to reload the clamd service.
* Convert freshclam service to a oneshot service activated by a systemd timer.
This way we can make clamd wait for freshclam to finish fetching the virus
database before failing to start if the database doesn't exist yet.
* Fixes console tools to work as expected as they require hardcoded config
file locations.
The old etcd port 4001 is no longer enabled by default in etcd 3.
The new port is 2379 and is officially assigned by IANA.
There were still some services left that expect etcd on port 4001 by default.
This changes the default to 2379 everywhere.
It should not cause problems for users as the etcd by nix does listen on the new port only by default anyway.
This needs to be included for VirtualBox to detect that it needs to start the video driver. "modesetting" is also set in virtualbox-image.nix but this line seems to take precedence over that one (even though the virtualbox-image.nix has a higher override?) This should fix the problems that I and a few others have been having with the .ova files built for nixos.org.
Fixes#20007.
This had already been fixed in f52f9bf7cd922b54c874e5500a2c64277e57d417,
but the problem was reintroduced in
bce59a1a8bb0430533178df080937ce24efe926a because the path to the XML
files changed.
Using the --force option on GRUB isn't recommended, but there are very
specific instances where it makes sense. One example is installing on a
partitionless disk.
The current default probe config uses the unwrapped fping binary, which
leads to an error because fping must be executed with elevated
permissions.
I fixed this by changing the path to the default binary to the
setuid-wrapped version.
