6.20.6 Sockets.SocketAddress class: host name lookup
- allByName: aString
- Answer all the IP addresses that refer to the the given host. If
a digit address is passed in aString, the result is an array
containing the single passed address. If the host could not be
resolved to an IP address, answer nil.
- byName: aString
- Answer a single IP address that refer to the the given host. If
a digit address is passed in aString, the result is the same as
using #fromString:. If the host could not be resolved to an IP
address, answer nil.