gtlspassword: Add flags signifying PIN type for PKCS#11
In a PKCS#11 operation there are multiple types of PINs possibly needed and these flags add a way to expose them to the user.
This design exactly matches gnutls' gnutls_pin_flag_t API.
In a PKCS#11 operation there are multiple types of PINs possibly needed and these flags add a way to expose them to the user.
This design exactly matches gnutls' gnutls_pin_flag_t API.