So, pkgsrc/graphics/fxtv and pkgsrc/audio/xmradio got saved because developers
who read this list had first-hand knowledge that they needed ic/bt8xx.h.

But note that ic/bt8xx.h defines no ioctls. There was no general way to
identify it as needed.

Couldn't this be the case with other stuff in the 2,000 pkgsrc directories?
What about third-party SW not yet pkgized?  The next import of XFree86?

//ross