npf_connkey_import
if (conkey == NULL || !npf_connkey_import(npf, conkey, fw)) {
if (conkey == NULL || !npf_connkey_import(npf, conkey, bk)) {
if (!key_nv || !npf_connkey_import(npf, key_nv, &key)) {
unsigned npf_connkey_import(npf_t *, const nvlist_t *, npf_connkey_t *);