FSDG xsane lib/snprintf.c is under an Artistic License

See https://trisquel.info/en/issues/11794 and #6 (closed) and #7 (closed) .

Investigate and potentially rework Legimet's patch.

mentioned in commit b21dfd99

trisquel/package-helpers!12 (merged) contains b21dfd99

mentioned in commit aklis/package-helpers@b21dfd99

Status changed to closed

mentioned in commit mixalis/package-helpers@b21dfd99