nsec3_domain_part_of_zone
if(nsec3_domain_part_of_zone(domain, zone) && domain->nsec3 &&
(!domain->parent || nsec3_domain_part_of_zone(domain->parent, zone)) &&
&& nsec3_domain_part_of_zone(domain->nsec3->nsec3_cover,
nsec3_domain_part_of_zone(d, z) && !domain_is_glue(d, z);
&& nsec3_domain_part_of_zone(d->parent, z);
int nsec3_domain_part_of_zone(struct domain* d, struct zone* z);