Tools/msi/msi.py

correctly references to "bogus variable" (e.g. "prefix=$/opt/python").

each call to their encode() method anymore, but continue to call the reset()
method if the final argument is True.

their encode() method anymore, but continue to call the reset() method if the
final argument is True.

merge 3.1 -> 3.2

zlib.decompress() anymore to be able to unload the module.