ratecheck
int ratecheck(struct timeval *, const struct timeval *);
if (ratecheck(last, minint) == 0)
if (ratecheck(&hs->hs_lastperr, &ieee80211_hwmp_perrminint) == 0)
!ratecheck(&ic->ic_last_merge_print, &merge_print_intvl))
if (!ratecheck(&ra->ra_last_raise, &ra->ra_raise_interval))