This patch removes support for WIN16 from Python, to 
allow simplification of some obfuscated code (in 
particular in posixmodule). According to PC/readme.txt, 
16-bit Windows is not supported anymore.

In addition to removing this code, it also streamlines the 
usage of the macros: MS_WINDOWS is now 
synonymous to MS_WIN32, and the patch replaces all 
occurrences of MS_WIN32 with MS_WINDOWS. The 
definition of MS_WIN32 is left alone, for backwards 
compatibility.

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I looked through the patch.  I didn't see any negative
effects on non-windows builds.
The change was almost always MS_WIN32 -> MS_WINDOWS.

I can't test the code though, since I don't have MS windows. :-)
Maybe we could remove all that useless windows code? :-)
Seriously, the patch seems fine and is probably a good idea,
but I can't really give any guidance, but the patch worked
fine on Linux.

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Mark, is this OK by you?  It's OK by me.

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Looks good to me!  Back to Martin to check in.

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Committed as

 _codecsmodule.c 2.12
_hotshot.c 1.19
_localemodule.c 2.33
mmapmodule.c 2.39
posixmodule.c 2.241
signalmodule.c 2.70
timemodule.c 2.128
fileobject.c 2.164
unicodeobject.c 2.155
PC/getpathp.c 1.27
PC/pyconfig.h 1.11
bltinmodule.c 2.261
dynload_win.c 2.11
errors.c 2.70
frozenmain.c 2.28
import.c 2.208
pythonrun.c 2.161
sysmodule.c 2.107