* Make the core library support a configuration file (/etc/itkacl.conf),
reading the DNS zone name from there instead of hard-coded it in.
* Switch to libunbound as the resolver, primarily to get DNSSEC support.
* Add DNSSEC support to the core library.
* Make the core library support a configuration file (/etc/itkacl.conf),
reading the DNS zone name from there instead of hard-coded it in.
* Switch to libunbound as the resolver, primarily to get DNSSEC support.
* Add DNSSEC support to the core library.