Tweak the configure script to build setup.cfg

PyObject_RichCompare() and PyObject_RichCompareBool().

XXX Note: the code that checks for deeply nested rich comparisons is
bogus -- it assumes the two objects are always identical, rather than
using the same logic as PyObject_Compare().  I'll fix that later.

   Check in the setup.py script, and the setup.cfg.in file, which
   handle compiling and installing as many extension modules as possible

- Removed the nb_add slot from the PyNumberMethods struct.

- Renamed Py_TPFLAGS_NEWSTYLENUMBER to Py_TPFLAGS_CHECKTYPES.

- Added typedef richcmpfunc.

- Added tp_richcompare slot to PyTypeObject (replacing spare tp_xxx7).

- Added APIs PyObject_RichCompare() and PyObject_RichCompareBool().

- Added rich comparison operators Py_LT through Py_GE.

sys.prefix + 'config/Makefile'. When building Python for the first
time, these files aren't there, so the files from the build tree have
to be used instead; this file adds an entry point for specifying that
the build tree files should be used.  (Perhaps 'set_python_build' should
should be preceded with an underscore?)

__getattr__() method, which clearly (like the other methods) was
intended to pass the __getattr__() call on to the self.err object,
mistakenly returned getattr(self, self.err) rather than
getattr(self.err, attr).  Since self.err is not a string, this always
raises a TypeError.  Apparently that doesn't bother for the one
attribute for which __getattr__() is actually called ('__coerce__'),
but it broke the rich comparisons stuff that I'm trying to get into
shape, so I'm fixing this now.  (I could also simply remove the
__getattr__() method, but fixing it seems more in the spirit of what
the ComparableException class is trying to do.)

the test_charmapcodec test via the test package.

was never enabled.

\t\t\t\t\treal code
##\t\t\t\t\tunused code
\t\t\t\t\treal code

via untabifying and shifting the real code left.  Semantically the
same but made the intent of the commented-out-in-column-0 unused code
unclear.  The exact same unused code appears to have gotten copied from
file to file over the years.

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."

<cpr@emsoftware.com>.

warnings.filterwarnings() call.  This suppresses the warning when the
module is imported with its full name (test.test_regex) too.

simpler if we use fgetpos and fsetpos, rather than trying to mess with
platform-specific TELL64 alternatives.

Of course, this hasn't been tested on a 64-bit platform, so I may have
to withdraw this -- but I'm hopeful, and Trent Mick supports this
patch!

for done[n] can be integers as well as strings, but the code
concatenates them with strings (fixed by adding a str()) and calls
string.strip() on them (fixed by rearranging the logic)

(Presumably this wasn't noticed previously because parse_makefile()
was only called on Modules/Makefile, which contains no integer-valued
variables.)

produce a list of unique filenames:
    "While attempting to build an RPM using distutils on Python 2.0,
    rpm complained about duplicate files.  The following patch fixed
    that problem.

Trigger keep-console-open on GUSISIOUX_STATE_UNKNOWN. Better than the previous complicated expression.

when configure detects the presence of termios.h; later we'll use this
for correct configuration of edline/readline.

Also, fix a bug in acconfig.h -- somebody forgot to add an undef to
cover the LIBNDBM configure symbol, which was preventing autoheader
from working properly.

These basically just make available to the user what userhook()
does to the source stack.  Documentation included.

in case the parameters are out of bounds and fixes error handling
for .count(), .startswith() and .endswith() for the case of
mixed string/Unicode objects.

This patch adds Python style index semantics to PyUnicode_Count()
indices (including the special handling of negative indices).

The patch is an extended version of patch #103249 submitted
by Michael Hudson (mwh) on SF. It also includes new test cases.

compatibility patches.

readers', others *after*. (Netscape Collabra for the first category,
INN-which-forks-nnrpd for the second.)

    prevent creating files such as build/lib.whatever/Modules/foo.o
    when given a source filename such as Modules/foo.c.