pf_state_key_detach
pf_state_key_detach(s,
pf_state_key_detach(s, PF_SK_STACK);
pf_state_key_detach(s, PF_SK_WIRE);
pf_state_key_detach(s, PF_SK_WIRE);
static void pf_state_key_detach(struct pf_kstate *, int);