def initialize(args = {})
@version_style = args[:version_style] || :append
cfg = Dnsruby::Config.new
rescfg = { :nameserver => cfg.nameserver, :ndots => cfg.ndots,
:apply_domain => false, :apply_search_list => false}
resargs = { :config_info => rescfg, :use_tcp => false, :recurse => false,
:packet_timeout => 2, :retry_times => 1, :retry_delay => 1,
:dnssec => false, :ignore_truncation => true, :src_address => '0.0.0.0',
:udp_size => 512 }
@resolver = Dnsruby::Resolver.new(resargs)
@resolver.udp_size = 512
end