nvlist_free_number
nvlist_free_number(nvl, key);
nvlist_free_number(nvl, "nvlist/number");
nvlist_free_number(nvl, "nvlist/number");
nvlist_free_number(nvl, "maxupdates");
nvlist_free_number(nvl, "flags");
nvlist_free_number(nvl, "version");
void nvlist_free_number(nvlist_t *nvl, const char *name);