maxx: license fixups

The main thing is that I'm convinced the license can't be free when it
restricts redistribution to certain platforms.  That probably holds with
the usual definitions like from Debian, FSF or OSI.

pkgs/desktops/maxx/default.nix

@@ -82,8 +82,9 @@ in stdenv.mkDerivation {
     description = "A replica of IRIX Interactive Desktop";
     homepage = http://www.maxxinteractive.com;
     license = {
+      fullName = "The MaXX Interactive Desktop for Linux License Agreement";
       url = http://www.maxxinteractive.com/site/?page_id=97;
-      free = true;
+      free = false; # redistribution is only allowed to *some* hardware, etc.
     };
     maintainers = [ maintainers.gnidorah ];
     platforms = ["x86_64-linux"];