/* unlink txs and zcack from the conn */
list_add(&tx_list, &conn->uc_tx_list);
list_del_init(&conn->uc_tx_list);
list_add(&zcack_list, &conn->uc_zcack_list);
list_del_init(&conn->uc_zcack_list);
/* unlink txs and zcack from the conn */
list_add(&tx_list, &conn->uc_tx_list);
list_del_init(&conn->uc_tx_list);
list_add(&zcack_list, &conn->uc_zcack_list);
list_del_init(&conn->uc_zcack_list);