Function krb5_sys::krb5_get_credentials_validate

pub unsafe extern fn krb5_get_credentials_validate(context: krb5_context,
                                                   options: krb5_flags,
                                                   ccache: krb5_ccache,
                                                   in_creds: *mut krb5_creds,
                                                   out_creds: *mut *mut krb5_creds)
                                                   -> krb5_error_code