The really annoying this about handle inheritance is that even if a 
subprocess is never referencing or using logging there can be an open 
file handle conflict due to the default inheratence.

Another tack from modifying Popen, 

I looked at the forking.py of multiprocessing and observed the 
techniques for changing the inheratance attribute of files handles 
using the _subprocess wrapper to the NT DuplicateHandle call.

Then by replacing the _open of the FileHandler to ensure handles are 
open non-inheritable I can ensure that log files are not inherited. 
This preserves the behavior of everything else. 

I attached the NT/Multiprocessing safe version of a RotatingFileHandler 
class