nfc_pw_token can be used to build random NFC password token for WPS.
This tool prints out the wpa_supplicant.conf (or hostapd.conf)
parameters and the hexdump of the WPS password token (with and without
NDEF encapsulation) so that it can be written to a NFC tag with an
external program.
Signed-hostap: Jouni Malinen <j@w1.fi>
