BTN_TOOL_FINGER, BTN_TOOL_DOUBLETAP and BTN_TOOL_TRIPLETAP. Note that
this swaps the direction of the Y axis internally to match X and the
linux input subsystem. Because of this, the TopEdge and BottomEdge
parameters must be modified in the config file. There is some backwards
compatibility code for old 2.5/2.6 kernels that will probably be
deleted later.