also sprach Jim Meyering <jim@meyering.net> [2008.05.05.1829 +0100]:
> If no one volunteers to do this soon
> I'll put it on the TODO list.

FWIW, this is a zsh-style way of dealing with it. It's not exactly
rocket science, I just use an associative array to uniquify:

  http://git.madduck.net/v/etc/zsh.git?a=blob;f=.zsh/zshrc/89_dircolors;hb=HEAD

-- 
 .''`.   martin f. krafft <madduck@debian.org>
: :'  :  proud Debian developer, author, administrator, and user
`. `'`   http://people.debian.org/~madduck - http://debiansystem.info
  `-  Debian - when you have better things to do than fixing systems