Added creation of the disnix group on first startup, if the disnix service is enabled

svn path=/nixos/trunk/; revision=21164

modules/misc/ids.nix

@@ -51,7 +51,7 @@ in
     uptimed = 29;
     ddclient = 30;
     davfs2 = 31;
-    privoxy = 32;
+    privoxy = 32;    
     # When adding a uid, make sure it doesn't match an existing gid.
 
     nixbld = 30000; # start of range of uids
@@ -89,6 +89,7 @@ in
     polkituser = 28;
     davfs2 = 31;
     privoxy = 32;
+    disnix = 33;
     # When adding a gid, make sure it doesn't match an existing uid.
 
     users = 100;

modules/services/misc/disnix.nix

@@ -36,6 +36,11 @@ in
     services.dbus.enable = true;
     services.dbus.packages = [ pkgs.disnix ];
 
+    users.extraGroups = singleton
+      { name = "disnix";
+        gid = config.ids.gids.disnix;
+      };
+      
     jobs.disnix =
       { description = "Disnix server";