"machine name" in ntalkd(8) request packets, when the destination
and source are local.
This should make talk(1) use much more pleasant for those security-
conscious individuals who have chosen to bind talkd to "localhost".
Previous to this change, talk(1) would require that the hostname of
the machine, as retrieved by gethostname(3), resolved to a valid and
reachable IPv4 address, using gethostbyname(3).
This makes talk(1) dependent on a valid host entry for "localhost"
in /etc/hosts (or the Domain Name System).
PR: bin/23178
Submitted by: angui.sh admin (with cleanups)
remote peer will be connected through. This avoids the ``Checking for
invitation on caller's machine'' problem for multi-homed hosts.
Thanks to: Garrett, for his `find_interface' example
aa.bb aa:bb and aa!bb treated as user+host and not as local user
names (especially aa.bb is common case).
Only @ is valid user/host separator according to manpage.
Pointed-by: doctor@dream.demos.su
