New-bus unit wiring via hints..

[Robert Backhaus]

Any chance of extending this to the USB bus? The problem of 'wandering
ugen' and 'wandering ulpt' devices has been bothering me for a while
now.
It would also help if it could be used to tell more specific drivers
to leave a device for ugen - for instance, HP USB printers are best
addressed by ugen, and the user mode drivers take it from there. You
loose functionality if you have to talk through the ulpt drivers.