get_phase2_private_key_scheme

Returns the scheme used to store the "phase 2" private key.

If the returned scheme is nm_setting_802_1x_ck_scheme_blob, use get_client_cert_blob; if nm_setting_802_1x_ck_scheme_path, use get_client_cert_path ; if nm_setting_802_1x_ck_scheme_pkcs11, use get_client_cert_uri.

Parameters:

this	the Setting8021x

Returns:

scheme used to store the "phase 2" private key (blob or path)