Suppressing a modifier key on specific key presses

[wettstae at gmail.com]

> The first redirect "RedirectKey(keycode=<FK15>, mods=Super)"  redirects to
> <FK15> but it does not set the mod key(Super). I have tried
> "modifiers=Super" instead of "mods=Super" and I have also tried real
> modifiers like Shift, Control and virtual modifiers like Alt.

Indeed, mods=Super seems to be broken (a bug in xkbcomp, I suppose).
But mods=Mod4 works for me.

Andreas