Displays the visual verification code and also generates a .wav version so you can hear it.
void VerificationCode ()
- Can be accessed at index.php?action=verificationcode
- Various querystring parameters available, but are mostly used internally
- You really shouldn't access this directly unless you clicked on a link to listen to the code or regenerate a code...
- Works best if you have GD available, but will try to output a code even if you don't