bug#24744: coreutils: dircolors - recognize both st and stterm

[Jari Aalto]

Background:

    Debian has packaged the "st" (simple term) under name
    "stterm" and named the command repectively. This has to
    do with not profiliterating /usr/bin with two lettter
    commands that are not system commands. Terminal
    commands, like st, are not in that cateory.

    Users are recomended to use standard shell feature like:

    alias st=stterm

Currently dircolors recognizes terminal "st".

It would be nice if dircolors also recognized terminal with
name "stterm".

thanks,
Jari