dsl_destroy_snapshots_nvl
error = dsl_destroy_snapshots_nvl(nvl, defer, errlist);
int dsl_destroy_snapshots_nvl(struct nvlist *snaps, boolean_t defer,
int dsl_destroy_snapshots_nvl(struct nvlist *, boolean_t,
return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));