keep track of old Julian L866 patch

This was

18021642d3c13a19213647d786c9aa7557e129aa Mon Sep 17 00:00:00 2001
From: Michel Arruat <michel.arruat@cern.ch>
Date: Fri, 22 May 2015 17:47:34 +0200
Subject: [PATCH] ACDipole for L866:         - Driver: Last fixes done by
 Julian to be L866 compliant         - Library: change made
 by Nicolas Magnin

and there is no way to rebase this sensibly on top of current master.
Most modifications are superseded by the current acdx driver, which
should work fine on L866.