Move all of NixOS to nixos/ in preparation of the repository merge

nixos/modules/services/logging/klogd.nix

@@ -0,0 +1,42 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+{
+  ###### interface
+
+  options = {
+
+    services.klogd.enable = mkOption {
+      type = types.bool;
+      default = versionOlder (getVersion config.boot.kernelPackages.kernel) "3.5";
+      description = ''
+        Whether to enable klogd, the kernel log message processing
+        daemon.  Since systemd handles logging of kernel messages on
+        Linux 3.5 and later, this is only useful if you're running an
+        older kernel.
+      '';
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf config.services.klogd.enable {
+
+    jobs.klogd =
+      { description = "Kernel Log Daemon";
+
+        wantedBy = [ "multi-user.target" ];
+
+        path = [ pkgs.sysklogd ];
+
+        exec =
+          "klogd -c 1 -2 -n " +
+          "-k $(dirname $(readlink -f /run/booted-system/kernel))/System.map";
+      };
+
+  };
+
+}