DeviceUpdateScatterFactor

Specifies the number of seconds up to which a device may randomly delay its download of an update from the time the update was first pushed out to the server. The device may wait a portion of this time in terms of wall-clock-time and the remaining portion in terms of the number of update checks. In any case, the scatter is upper bounded to a constant amount of time so that a device does not ever get stuck waiting to download an update forever.