Middle button emulation...

[Robert Heller]

I can't seem to find the option/setting magic to get middle button emulation
enabled and working. This is on a Raspberry Pi (Raspbian with
xserver-xorg-input-all 1:7.7+16 and xserver-xorg-input-libinput 0.20.0-1). I
have a keyboard/trackball combo device and it only has two buttons. I have
been using (proper) three button pointer devices on all of my other machines
and I really need that middle button.  I'm not seeing anything in any of the 
man pages.  Has middle button emulation been dropped?  (Where have all the 
hard core / old school UNIX hackers gone? Am I the only one left?)

-- 
Robert Heller             -- 978-544-6933
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