Function krb5_sys::krb5_read_password

pub unsafe extern fn krb5_read_password(context: krb5_context,
                                        prompt: *const c_char,
                                        prompt2: *const c_char,
                                        return_pwd: *mut c_char,
                                        size_return: *mut c_uint)
                                        -> krb5_error_code