Asynchronous Domain Name System (DNS) methods.
Static methods
staticlookup (hostname:String, ?lookupOptions:DnsLookupOptions, callback:Callback<Array<Address>>):Void
Looks up the given hostname. callback will be called once the operation
completes. In case of success, the data given to callback is an array of
nusys.net.Address instances representing all the IP addresses found
associated with the hostname.
lookupOptions.family- if notnull, only addresses of the given IP family will be returned.