Make ifconfig more forgiving when /proc is not mounted

Avoid endless recursion when /proc/net/dev is empty :-)

Patch from "Mike Phillips" <phillim@amtrak.com>

This is for consistency with rarp /etc/ethers. Default to /etc/ethers
when no file name is supplied.

This hack does not work with IPv6, but arp does not work with IPv6
anyways so it does not matter.

Patch from Thorsten Kukuk

Fixed man pages (only German and English one).

Add blurb about automagic subnet arp.

For the de and en Versions I also added a short note on how it is useful
to work around pmtu blackhole problems. For fr and pt I just deleted
the offending sentence.

mandatory argument.

it served no useful purpose.  Please check I didn't break your
favourite hardware type in the process.
Add derisory support for Ash protocols.

Found by Rick Hohensee.

attached is Czech (cs) translation of the net-tools messages. It was announced
to Czech mailing list several weeks ago and I received no complaints so far,
so it should be ready for distribution.

Only build util-ank if iptunnel and ipmaddr were requested

(thanks to Ulrich Drepper)

fd leak.

Fix some buffer overruns.
Add support to netstat for GRE and ESP.

* ecki: now use O_NDELY for opening the devie file, this will enable us
  to open the new-style (kernel 2.2) ttySx files, since cua is deprecated

to get the old behaviour)
Update i18n comment in config.in

(vanstee@worldnet.fr)

on some machines).  Don't include it in util-ank.c therefore.

Take out special-casing of Ash and ATM for don't-print-null-
hwaddr purposes; make it a flag in struct hwtype.
Add appropriate /proc check for Econet presence.
Call it 1.52.