Import net/powerdns-pgsql.

Import net/powerdns-pgsql.

The PowerDNS nameserver is a modern, advanced and high performance
authoritative-only nameserver.  It is written from scratch and conforms
to all the relevant DNS standards documents.  PowerDNS is open source.

The PowerDNS nameserver utilizes a flexible backend architecture that
can access DNS information from any data source.  This includes file
formats, BIND zone files, relational databases or LDAP directories.

This packages provides the PostgreSQL backend module.