Python 2.3 will support source code encodings which rely on the
builtin codecs being available to the parser.

Remove struct dependency from codecs.py

   and disabled from the configure script.

   The final piece of this change...

   Strip down Setup.config.in and Setup.dist to the minimal sets required
       to get a working Python; setup.py will handle the rest

builds during which he forgot to uncomment crucial library lines in
Setup, walks into Guido's East End nightclub with a tactical nuclear
weapon on his shoulder.  Said nuclear weapon is promptly deployed
exactly where it will do the most good, right in the middle of
configure.in.

With this patch, the set of libraries autoconfigured in is extended to
include ndbm, gdbm, and crypt.  This essentially eliminates any need to
tweak Setup for a normal Linux build.

"'E was a fair man.  Cruel, but fair."

of dbmmodule dynamically by default (otherwise it can pull in
dependencies with libdb that croak pybsddb3).  This change moves the
Setup line for dbmmodule to Setup.config.in.

curses and readline (for Linux, at least).

These are done as shared libraries by default, and so is bsddb -- that
seems to make the most sense.

automatically if dbopen is found in libc or libdb.  This closes patch
#101420