This is a rewrite of the popular tool unclutter, but using the x11-xfixes
extension. This means that this rewrite doesn't use fake windows or
pointer grabbing and hence causes less problems with window managers
and/or applications.

WWW: https://github.com/Airblader/unclutter-xfixes

PR: 210302
Submitted by: Oleg Gushchenkov <gor@clogic.com.ua>
Differential Revision: https://reviews.freebsd.org/D6785