wconnect: change default wpa_supplicant driver nl80211 => wext
winfo: add --att=ATT_NAME command line arg for reading 'ATT_NAME=' from wifi.conf
winfo: print a warning to stderr if attempting to list unknown SSID
winfo: add 'driver' to allowed attributes
wconnect: push driver through to connectWifi()
wconnect: override wpa driver if 'driver=' is specified in wifi.conf