Allow user to specify the scan interval for searching for devices.
Scanning places every interface on the machine in promiscuous mode
and currently runs once a second. This behaviour may have undesirable
side-effects and also pollutes the kernel log.
The new parameter --scan-interval-ms <interval> will allow the user
to specify the rate at which scanning occurs. If equal to 0, then
only a single scan is performed.
Jorge Alejandro
Kyle Schwarz
Gary Chong
Paul Hollinsky