ub_rrset_key_delete
ub_rrset_key_delete, rrset_data_delete, alloc);
void ub_rrset_key_delete(void* key, void* userdata);
else if(fptr == &ub_rrset_key_delete) return 1;
ub_rrset_key_delete, rrset_data_delete, alloc);
void ub_rrset_key_delete(void* key, void* userdata);
else if(fptr == &ub_rrset_key_delete) return 1;