YKCS11: allow key generation for retired keys slots.
YKCS11: allow key generation for retired keys slots.

akgood/yubico-piv-tool,Yubico/yubico-piv-tool,Yubico/yubico-piv-tool,akgood/yubico-piv-tool,akgood/yubico-piv-tool,Yubico/yubico-piv-tool,akgood/yubico-piv-tool