Rename HandleClickWithFingers to handle_clickfinger.
Rename HandleClickWithFingers to handle_clickfinger.

The option is called ClickFinger, the man page talks this way about it, sync up
the code with it.
No functional change.

Signed-off-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>
Reviewed-by: Jamey Sharp <167c1dcbbc9c320e8e02a0c15c886204b4e658a4@minilop.net>

sencer/synaptics,sencer/synaptics,mortehu/xf86-input-synaptics,ssaavedra/xf86-input-synaptics,kelnos/xf86-input-synaptics,philipn/xserver-xorg-input-synaptics,felipejfc/xserver-xorg-input-synaptics,corcoran/xserver-xorg-input-synaptics,gdestuynder/xf86-input-synaptics,Lyude/xf86-input-synaptics,ssaavedra/xf86-input-synaptics,philipn/xserver-xorg-input-synaptics,eyko/xf86-input-synaptics,felipejfc/xserver-xorg-input-synaptics,jiixyj/xf86-input-synaptics,Lyude/xf86-input-synaptics,joeshaw/xf86-input-synaptics,quadpixels/three-finger-dragging,gdestuynder/xf86-input-synaptics,philipn/xserver-xorg-input-synaptics,mmonaco/xf86-input-synaptics,nanderson94/xf86-input-synaptics,eyko/xf86-input-synaptics,kelnos/xf86-input-synaptics,RsrchBoy/xserver-xorg-input-synaptics,jiixyj/xf86-input-synaptics,RsrchBoy/xserver-xorg-input-synaptics,joeshaw/xf86-input-synaptics,quadpixels/three-finger-dragging,mortehu/xf86-input-synaptics,felipejfc/xserver-xorg-input-synaptics,nanderson94/xf86-input-synaptics,mmonaco/xf86-input-synaptics,corcoran/xserver-xorg-input-synaptics