server:
 num-threads: 2
 local-data: 'www.example.com. A 192.168.1.1'
 local-data: 'example.com. MX 10 mail.example.com'
 local-data: 'example.com. MX 20 mail2.example.com'
 local-data-ptr: '192.168.1.1 www.example.com'