This is actually generalized old LinuxPacDrive driver. It kept here for backward
compatibility. So people have time to migrate on better new implementation.
Set LightsDriver to "PacDrive" to test the new driver.
GenericHID uses USB libusb_control_transfer to send data (4 bytes) over the wire where first 2 are
lights state. So any HID-like usb device can read the data and control lights.
Yauhen Artsiukhou