Local device notifications. This method is called if list of local devices changed (device was

plugged into a USB port/unplugged)




devname - sys name of device (unique USB device identifier obtained from kernel: hub-port[.port ...])

maxchild - number of hub ports (= 0 for USB devices, > 0 for hubs)

name - device name

added - true if device was connected to a USB port, false if device was disconnected