Overrides the core gethostbyname and
gethostbyaddr functions with object-oriented versions that return
Net::hostent objects. The objects have methods that 
return the fields of the same name from 
the hostent structure in netdb.h:
| Field | Description | 
|---|---|
addr | Address of host, for backwards compatibility  | 
addr_list | List of addresses returned from name server  | 
addrtype | Host address type | 
aliases | List of aliases | 
length | Length of address | 
name | Name of host | 
You can access the structure fields either with the methods or by
importing the fields into your namespace with the :FIELDS import tag
and then accessing them by prepending h_ to the field name:
Net::hostent exports the following:$host_obj->name() $h_name