3.9 Using devfs (no longer supported)

Previous versions of ttylinux had support for running Linux kernels with the devfs device filesystem enabled. However, starting from the 2.6 kernel, devfs is considered obsolete by the main kernel developers. A replacement solution is called udev and runs completely in user space. As a consequence, I have dropped the minimal devfs support that was present in ttylinux. As of now, udev integration is not planned because I still want to support pre-2.6 kernels, but that may change in the future.