driver in Linux 2.6. uscanner was just a simple wrapper around a fifo and
contained no logic, the default interface is now libusb (supported by sane).
Reviewed by: HPS
initially written by Roland, but hacked for a while by me. Any
good parts are the results of Roland's hard work. Any typos or
style mistakes are mine.
Submitted by: Roland Smith <rsmith@xs4all.nl>
PR: docs/63808, docs/75433, docs/80458, docs/80459
MFC after: 2 weeks