improved complete support: the list of available variable name completions is dubbed

[Antony Pavlov]

Hi, All!

I have tested improved complete support in barebox.

I have found that the list of available variable name completions is
dubbed, e.g.

barebox:/ echo $<TAB>
$PATH               $net.nameserver     $net.domainname
$cs0.baudrate       $cs0.active         $cs1.active
$cs1.ip             $cs1.port           $eth0.ipaddr
$eth0.ethaddr       $eth0.gateway       $eth0.netmask
$eth0.serverip      $PATH               $net.nameserver
$net.domainname     $cs0.baudrate       $cs0.active
$cs1.active         $cs1.ip             $cs1.port
$eth0.ipaddr        $eth0.ethaddr       $eth0.gateway
$eth0.netmask       $eth0.serverip
barebox:/

This barebox build is based on the 'next' git branch, last commit is

commit e4e3fbd22bca38f10f1cd7a3f5eb75e0b265dcaa
Merge: 8ca4264 9492976
Author: Sascha Hauer <s.hauer at pengutronix.de>
Date:   Tue May 1 21:41:59 2012 +0200

    Merge tag 'complete_update_support' of git://git.jcrosoft.org/barebo

-- 
Best regards,
  Antony Pavlov