Bug#842422: network-manager: NetworkManager fails to authenticate with old 802.11bg USB devices

[Hillie Sample]

> add this to /etc/NetworkManager/NetworkManager.conf
> per bug #835553
>
> [device]
> wifi.scan-rand-mac-address=no
That worked for me with a Ralink Technology, Corp. RT5370 Wireless 
Adapter on Debian Stretch.  Thank you very much.