dname_copy
const dname_type *dname_copy(region_type *region, const dname_type *dname);
state->previous_owner = dname_copy(state->previous_owner_region, dname);
cmz->member_id = dname_copy(xfrd->nsd->options->region,
to_add->member_id = dname_copy( xfrd->nsd->options->region