Patch # 1050 by Amaury Forgeot d'Arc.
On Windows, debug builds insert stack probes, and recursive functions
tend to exhaust the stack faster.
This patch reduces the marshal maximum depth from 2000 to 1500 for debug
builds only. Optimized builds are not affected.
This allows test_marshal to pass with debug builds.
1/ getargs.diff adds the 'Z' and 'Z#' format specifiers for
PyArg_ParseTuple. They mimic z and z# for unicode strings, by accepting
a Unicode or None (in which case the Py_UNICODE* pointer is set to
NULL). With doc and tests.
2/ subprocess.diff converts file PC/_subprocess.c to unicode. We use the
Unicode version of the win32 api (and Z conversion from previous patch)
3/ stdout.diff: sys.stdout must not convert the line endings, Windows
already does it.
Without this patch, when redirecting the output of python, the file
contains \r\r\n for each line. (test_subprocess did catch this)
However, I (GvR) removed the change to _fileio.c (included in the
patches) that prevents closing file descripors < 3 from being closed;
I think that needs to be solved in a different way.
