Instead of uting nfc_initiator_transceive_dep_bytes() to transmit commands,
prepend an ISO-14443-4 header to it and send it using
nfc_initiator_transceive_bytes(). In case of WTX reply, handle it, and then
extract relevant information from the data returned by the PICC.
This prevents failure that happen with ISO-14443-4 compliant targets when using
a PN531-based NFC-device, and allows using the libfreefare with Mifare DESFire
targets on such devices.
Not a hack this time:
- Use the hexdump(3) function of the system if it exists;
- Build the subpart of FreeBSD's libutil if not (contrib);
- Do this only if configured --with-debug.
The Mifare Classic / Ultralight code will be eventually changed to also provide this functionality.
