For the record.
My scanner Epson Workforve WF-7610 was not recognized by iscan yet xsane 
recognized it.

sudo -u saned scanimage -L
returned 
device `epson2:net:192.168.1.30' is a Epson PID 08B9 flatbed scanner

but it did not work.
It used to work flawesly with the same configuration BEFORE upgrading to 17.10.

My workaround:
a) Commented epson2 and epson in /etc/sane.d/dll.conf . I added epkowa.
b) epkowa.conf has the correct net ip.
c) I copied epkowa drivers to correct lib folder
cp /usr/lib/sane/libsane-epkowa.* /usr/lib/x86_64-linux-gnu/sane/

after that 
sudo -u saned scanimage -L
returned 
device `epkowa:net:192.168.1.30' is a Epson WF-7610/7620 Series flatbed scanner

and iscan ran again.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to sane-backends in Ubuntu.
https://bugs.launchpad.net/bugs/1728012

Title:
  Many 3rd party scanner drivers are broken by a sane change

Status in sane-backends package in Ubuntu:
  Confirmed

Bug description:
  Many scanners can no more be used since sane has changed something:
  The 3rd-party plug-in the vendor provides as .deb package will still
  install. But the scanner is no more recognized.

  Scanners that are affected are(besides others):
   - Epson Perfection V10
   - Epson Perfection V1000
   - Epson WorkForce GT-1500
   - Brother MFC-8510DN
   - Epson Perfection V33

  It is to note that the probability that the scanner manufacturers fix
  things others broke is below 100%.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: libsane1 1.0.27-1~experimental2ubuntu2
  Uname: Linux 4.14.0-041400rc5-lowlatency x86_64
  ApportVersion: 2.20.7-0ubuntu3.1
  Architecture: amd64
  Date: Fri Oct 27 12:35:52 2017
  EcryptfsInUse: Yes
  SourcePackage: sane-backends
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1728012/+subscriptions

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