Rename ::config::pri_a to ::config::pri_hostname as the value is the server's hostname.
Rename ::config::sec_a to ::config::sec_hostname as the value is the server's hostname.
Rename ::config::pri_ptr to ::config::pri_v4 as the value is the NS primary IPv4 address.
Rename ::config::sec_ptr to ::config::sec_v4 as the value is the NS secondary IPv4 address.
Merge pull request #4 from norrs/config_variables_renames

Config variables renames from norrs