[fedora-virt] proprietary virtualbox extensions for usb, rdb, and pxe boot

I used to grit my teeth and use them, but Oracle's behavior in the Oracle v. Google lawsuit disgusts me, and I don't want to have anything to do with Oracle. You have to have an Oracle account for the virtualbox forums. Trying to sort through the alternatives. I really want usb, rdb, and pxe boot. But I can live without them for now if I have to. Virtualbox ran well on systems without svm, or vmx flag, and I'm not ready to upgrade boxes. -- Drew Einhorn "You can see a lot by just looking." -- Yogi Berra