Message 241695 - Python tracker

I've incorporated some of the feedback from the reviews into this new patch. I used the PyMem_Raw* functions to do allocation to avoid having to acquire the GIL and also avoid complciations from the builtin memory allocator, since I'm not using python objects.

I have also fixed a memory leak in my original patch, as well as a case where OSes with a small MAX_PATH fail with ENAMETOOLONG