[NEW] yubico-piv-tool

Hi,

here is a port of the Yubico Personal Identity Verification (PIV) Tool:

The Yubico PIV tool is used for interacting with the Privilege and
Identification Card (PIV) application on a YubiKey. With it you may
generate keys on the device, importing keys and certificates, and
create certificate requests, and other operations.

See https://developers.yubico.com/PIV/ for more information.

I have used this to successfully add ssh keys to a Yubikey and use them for
ssh authentication (without using gnupg).

Comments?
Ok?

/Benno