ipflog_clear
*(int *)data = ipflog_clear(unit, ifs);
tmp = ipflog_clear(unit, ifs);
(void) ipflog_clear(i, ifs);
tmp = ipflog_clear(IPL_LOGNAT, ifs);
tmp = ipflog_clear(IPL_LOGSTATE, ifs);
extern int ipflog_clear __P((minor_t, ipf_stack_t *));