Matto> Now that the microtek backend should properly handle
  Matto> sane_cancel, I've been cancelling scans left and right....
  Matto> It seems that when 'saned' processes a cancel request, it
  Matto> immediately closes the connection back to the net backend.
  Matto> This leaves the frontend (and net backend) confused and
  Matto> stalled.
Yup, I can reproduce this with xscanimage & the Mustek backend.
  Matto> I don't see why it should close the connection at all -- it's
  Matto> still valid for the frontend to ask for a new scan, change
  Matto> options, etc., after a scan is KO'ed.
Correct.  A "cancel" does close the _data_ connection, but the control
connection should remain open.  Off-hand, I'm not sure what's going
wrong.
	--david
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