class type resolver =object..end
method ipv6 : boolWhether host_by_name may return IPv6 addresses
method host_by_name : string -> Unixqueue.event_system -> Unix.host_entry engineLook up the passed host name up. The implementation can be synchronous
or asynchronous. In the first case, an engine is returned that is
already in one of the states `Done he or `Error e where he is
the host entry, or e is an exception like Host_not_found. In this
case the passed event system is ignored. If the implementation is
asynchronous, the caller must run the event system until the
state of the engine transitions to `Done he or `Error e.
