config.{guess,sub} turns 20

[Ben Elliston]

As there are no formal releases of the config.guess/sub scripts, I
thought I'd send a rare announcement.  As it's now 2012, these
well-known GNU scripts have turned 20.  config.guess was originally
written by Per Bothner, and Per also maintained config.sub for many
years post-1991.  (If you are the person who originally wrote
config.sub, please let us know!)

Very few of the obsolete systems detected by config.guess have been
removed and it has become a museum of sorts.  Here are a few examples
to reminisce about:

    RISC*:ULTRIX:*:*)
        echo mips-dec-ultrix${UNAME_RELEASE}

    m88k:CX/UX:7*:*)
        echo m88k-harris-cxux7

    M88*:DolphinOS:*:*)
        echo m88k-dolphin-sysv3

    DPX/2?00:B.O.S.:*:*)
        echo m68k-bull-sysv3

    paragon:*:*:*)
        echo i860-intel-osf1

    mc68030:UNIX_System_V:4.*:*)
        echo m68k-atari-sysv4

    *:TOPS-20:*:*)
        echo pdp10-unknown-tops20

You can get the scripts from https://savannah.gnu.org/projects/config,
and they are kept up-to-date in Gnulib
(https://savannah.gnu.org/projects/gnulib) for convenience.

Cheers,
Ben