_sasl_canon_user
result = _sasl_canon_user(conn, userstr, 0,
conn->cparams->canon_user = &_sasl_canon_user;
extern int _sasl_canon_user(sasl_conn_t *conn,
serverconn->sparams->canon_user = &_sasl_canon_user;
result = _sasl_canon_user(conn, user, 0,
result = _sasl_canon_user(conn, user, user_len,