Comment 6 for bug 1891682

I will prepare the sane-backends package appropriately:

1. Spin out sane-escl into its own binary package

2. Recommend sane-airscan

One remark:

sane-escl is actually not developed any more due to sane-airscan, so I am looking into whether there is an easy and maintainable way to (3) remove it altogether? WDYT?

See also

https://openprinting.github.io/OpenPrinting-News-April-2020/#driverless-scanning