what is 'vmmouse'?

[Michal Jaegermann]

In updates from today a new package 'xorg-x11-drv-vmmouse' showed
up. Its description is rather terse "X.Org X11 vmmouse input
driver".  There is also 'man vmmouse' but it does not differ that
much from 'man mouse-driver' from an already present package
'xorg-x11-drv-mouse'.

SYNOPSIS section is the same in both cases and main differences are
that some options are missing for vmmouse (EmulateWheelTimeout),
some defaults are different, and vmmouse consistenly refers to
XFree86, XF86Config, www.xfree86.org, ...  which does not look
correct in the context.  Hence my question.

   Michal