Merge pull request #273308 from Stunkymonkey/install-device-fix-mdadm

nixos/installation-device: remove warning about mdadm

Changed files
+2
nixos
modules
+2
nixos/modules/profiles/installation-device.nix
···
];
boot.swraid.enable = true;
+
# remove warning about unset mail
+
boot.swraid.mdadmConf = "PROGRAM ${pkgs.coreutils}/bin/true";
# Show all debug messages from the kernel but don't log refused packets
# because we have the firewall enabled. This makes installs from the