graphics/epsonscan2: Update 6.6.40.0 => 6.7.70.0
Old version crashes on 15.0-CURRENT amd64.
Also improve port: fix dependencies, add default option AVAHI.
PR: 284127
Approved by: J.R. Oldroyd <fbsd@opal.com>
Tested by: rhurlin
MFH: 2025Q1
(cherry picked from commit 345e28cb1c35be3fdaf460a048df0d2486db37a2)