Adds example usage to help(multiprocessing.reduction)

multiprocessing-reduction-py.patch

#
# This patch for multiprocessing/reduction.py adds example usage to 
# help(multiprocessing.reduction)
#
# Compatible with Python 2.6, 2.7 and 3.1.
#
6a7,20
> # Example usage:
> #
> #   # Main process
> #   from multiprocessing.reduction import reduce_handle
> #   h = reduce_handle(client_socket.fileno())
> #   pipe_to_worker.send(h)
> #   
> #   # Worker process
> #   from multiprocessing.reduction import rebuild_handle
> #   h = pipe.recv()
> #   fd = rebuild_handle(h)
> #   client_socket = socket.fromfd(fd, socket.AF_INET, socket.SOCK_STREAM)
> #   client_socket.send("hello from the worker process\r\n")
> #