Oops. I forgot the procedure for complaining about changes in xorg.conf
The right thing to do would have been to explode into conspiracy theories
in interminable threads on the xorg list about how the REAL problem with
AllowDeactivateGrabs was that a CONSPIRACY of EMACS users such as all the
X developers (ignoring the majority who use vi or edlin) had INTENTIONALLY
removed this feature with MALICE AFORETHOUGHT, knowing that the feature is
CRITICALLY useful when one is running dozens of VIRTUAL MACHINES under a
closed-source VM management tool on one's embedded TOASTER.