bird module: run as user/group `bird`, not `ircd`

Changed files
+2 -2
nixos
modules
services
networking
+2 -2
nixos/modules/services/networking/bird.nix
···
user = mkOption {
type = types.string;
-
default = "ircd";
+
default = "bird";
description = ''
BIRD Internet Routing Daemon user.
'';
···
group = mkOption {
type = types.string;
-
default = "ircd";
+
default = "bird";
description = ''
BIRD Internet Routing Daemon group.
'';