time.strptime().

- more clean up of the generated import library definiton (.DEF file)
  following checking of patch 770521, and tightening of the sed regexps.

- use -O3 even with gcc 2.8.1 - worth nearly 10% with 2.3; worth
  nothing with 2.2.x.

- clean up a couple of whitespace issues introduced by a cut'n'paste.

- separate the building of the core from the wrapper executables and the
  external modules (.PYDs), based on the Py_BUILD_CORE define;

- clean up the generated import library definiton (.DEF file) to remove
  references to a number of non-static symbols that aren't part of the
  Python API and which shouldn't be exported by the core DLL;

- compile the release build with -fomit-frame-pointer, for a small
  performance gain;

- make "make clean" remove byte compiled Python library files.

- add _csv module to the build list
- various cleanups

config.c:
- various cleanups

pyconfig.h:
- various cleanups

  PC/os2emx/
    Makefile
    README.os2emx
    config.c
    dlfcn.c            // libdl emulation code for loadable extensions
    dlfcn.h
    dllentry.c         // DLL initialisation routine for Python DLL
    getpath.c
    pyconfig.h
    python23.def       // Python DLL symbol export definitions
    pythonpm.c         // console-less PM interpreter wrapper