evnv_cmpnvl
if ((ret = evnv_cmpnvl(l1, l2, depth + 1)) != 0)
evnv_cmpnvl(*la1, *la2, depth + 1)) != 0)
int evnv_cmpnvl(nvlist_t *nvl1, nvlist_t *nvl2, int depth);
return (evnv_cmpnvl(r1->rsrc, r2->rsrc, 0));