Add storcli utility to apex

Reviewed-by: Aleix Boné <abonerib@bsc.es>

m/apex/configuration.nix

@@ -15,6 +15,10 @@
     "megaraid_sas" # For HW RAID
   ];
 
+  environment.systemPackages = with pkgs; [
+    storcli # To manage HW RAID
+  ];
+
   fileSystems."/home" = {
     device = "/dev/disk/by-label/home";
     fsType = "ext4";

m/common/base/nix.nix

@@ -6,6 +6,8 @@
     (import ../../../pkgs/overlay.nix)
   ];
 
+  nixpkgs.config.allowUnfree = true;
+
   nix = {
     nixPath = [
       "nixpkgs=${nixpkgs}"