PFTM_UDP_SINGLE
(*state)->timeout = PFTM_UDP_SINGLE;
my_timeout[PFTM_UDP_SINGLE] = 30; /* Unidirectional */
pf->timeout[PFTM_UDP_SINGLE] = PFTM_UDP_SINGLE_VAL;
{ "udp.single", PFTM_UDP_SINGLE },