Issue #12098: multiprocessing on Windows now starts child processes
  using the same sys.flags as the current process.
Backport from default branch.
Issue #10296 : Don't handle BreakPoint exceptions using
Structured Exception Handling on windows.
Issue #12098 : Fix a missing import in the unittests.
Issue #10211 : Buffer object should support the new buffer interface.
Issue #10212: Support new buffer interface for struct.unpack and
cStringIO
Use a larger amount of data for the interrupted_write tests so that
they work properly on systems configured with large pipe buffers.
site.py is needed to set up paths
this obviously is not going to raise any -3 warnings
fix issue reference