P_CONN_ST_CHG_REQ
cmd = connection->agreed_pro_version < 100 ? P_STATE_CHG_REQ : P_CONN_ST_CHG_REQ;
[P_CONN_ST_CHG_REQ] = "conn_st_chg_req",
[P_CONN_ST_CHG_REQ] = { 0, sizeof(struct p_req_state), receive_req_conn_state },