[sane-devel] Licenses of the backends

[Henning Meier-Geinitz]

Hi,

The following backend files use pure GPL without the SANE exception:

./backend/agfafocus.c
./backend/agfafocus.h

./backend/s9036.c
./backend/s9036.h

./backend/tamarack.c
./backend/tamarack.h

./backend/snapscan-usb.c
./backend/snapscan-usb.h

While the omission of the exception note is intentional for tamarack,
I'm not that sure about the other files. 

Especially the missing note in the snapscan-usb files voids the
exception in the snapscan backend. I propose to either use or not use
the exception, just to be consistant.

Bye,
  Henning