Issues found after hours of testing: Capturing handshakes channel based, not network based

[ifwg44]

Like known out of airodump-ng handshakes can be captured listening to just the channel. You do not have to listen to just a specific network on this channel.
Such implementation could speed up '-inf' mode and make it many times faster. Now just listen to channels (the scan functionality have find out to be used) and not to networks.