Speed up list operations by exploiting that the interface list is ordered,
and the kernel list is normally ordered to.

This allows to list 7000 aliases in a reasonable time.
Also be a bit smarter on when to read SIOCGIFCONF.

The stupid IPv6 /proc parsing on every address still burns a lot of CPU
time.

as reorted by ADAM Sulmicki.

from the top level makefile anymore, but this way it is more stable for a
stand alone libnet-lib anyway.

arp takes --numeric, not --umeric

Noticed by Hubert Mantel.

Use %u instead of %d for most outputs.

Patch from Richard Huveneers <richard@hekkihek.hacom.nl>

Try to fix the problem with alias interfaces and non INET sockets.

Pull code from ifconfig into interface.c; implement ifconfig -s
and netstat -i -e.

Patch from mrs.brisby@nimh.org.

Patch from "J.H.M. Dassen (Ray)" <jdassen@cistron.nl>

netstat

Patch from bryanh@giraffe-data.com (Bryan Henderson)

that?!)

Reported by Anthony Towns <ajt@debian.org>

Patch from Jeff Johnson

 - Change hostname.c to make translation easier.
 - Update pt_BR translation.
 - Rebuild net-tools.pot and merge the other .po files (me).