Current getaddrinfo() implemetation has a problem of too much resolving
waiting time on INET6 enabled systems.
-4 and -6 options can limit name resolving address family and is a possible
workaround for the problem.
Approved by: jkh
work of Luke Mewburn.
This includes, but is not limited to :
- commandline editing and history.
- local and remote filename completion.
- a new progress display.
- the ability to access files using either the ftp or http protocols,
and use http proxies for ftp transfers.
The FreeeBSD "restricted ports" functionality was preserved.
Obtained from: NetBSD
