nv_hashstring
size_t i = nv_hashstring(name) % nv->nv_hashsz;
bucket = nv_hashstring(NV_NAME(v)) % new_hashsz;
i = nv_hashstring(name) % nv->nv_hashsz;
size_t i = nv_hashstring(cname) % nv->nv_hashsz;