Call For Testers: Synaptics touchpads

Hi,

The attached patch adds support for newer touchpad features and implements two 
finger scrolling.  This is such a common feature these days that I think we 
should enable it by default and disable edge scrolling.  I've implemented some 
detection code to keep edge scrolling enabled when the touchpad has a 
dedicated area for scrolling.

Please test it and report back your experience.  To enable synaptics support, 
you need:

hw.psm.synaptics_support=1

in loader.conf.

Thanks,
-- 
Rui Paulo