PFTM_UDP_SINGLE
pt.timeout = PFTM_UDP_SINGLE;
pf->timeout[PFTM_UDP_SINGLE] = PFTM_UDP_SINGLE_VAL;
{ "udp.single", PFTM_UDP_SINGLE },
pf_update_state_timeout(*stp, PFTM_UDP_SINGLE);
timeout[PFTM_UDP_SINGLE] = PFTM_UDP_SINGLE_VAL;