Support for more wlan interfaces

[radio24]

Also sorta unrelated to this feature request but for those using a raspberry pi 3b (non-plus) would it be possible to implement a feature to use a second wifi adapter in access point mode for transmitting the torbox wifi since the 3b has only 2.4g built in wifi limited to about 100 mbps or under? since i'm using a pi 3b and it runs pretty good running torbox

Originally posted by @MCHAMSTERYT2 in #369