* Try to make sure restoreWifiAsync eventually sends a NetworkConnected
event...
re: #5109
* Take a page from @shermp's book, and make sure wpa_supplicant managed to
connect to the AP before acquiring an IP.
Tear down WiFi modules in case of failure.
c.f., https://github.com/shermp/Kobo-UNCaGED/pull/21
* Don't let restore-wifi-async.sh enable WiFi behind our back when we're
killing it to start Nickel...
* Don't even call ping if there's no default gw