nixos/boinc: create boinc group

This allows users that are members of the boinc group
to interact with the boinc service by running:

boincmgr -d /var/lib/boinc

Changed files
+3 -1
nixos
modules
services
computing
boinc
+3 -1
nixos/modules/services/computing/boinc/client.nix
···
environment.systemPackages = [cfg.package];
users.users.boinc = {
+
group = "boinc";
createHome = false;
description = "BOINC Client";
home = cfg.dataDir;
isSystemUser = true;
};
+
users.groups.boinc = {};
systemd.tmpfiles.rules = [
-
"d '${cfg.dataDir}' - boinc - - -"
+
"d '${cfg.dataDir}' - boinc boinc - -"
];
systemd.services.boinc = {