Source changes for compilation

These are the commits from
https://github.com/ahgamut/cpython/tree/cosmo_py36 squashed for
simplicity.

Also included is the pyconfig.h used for compilation. The pyconfig.h has
to be changed manually in case Cosmopolitan gets new features.

third_party/python/Lib/test/test_logging.py

@@ -47,6 +47,7 @@ import unittest
 import warnings
 import weakref
 try:
+    import _thread
     import threading
     # The following imports are needed only for tests which
     # require threading
@@ -1781,7 +1782,7 @@ class IPv6SysLogHandlerTest(SysLogHandlerTest):
 
     """Test for SysLogHandler with IPv6 host."""
 
-    server_class = TestUDPServer
+    server_class = None # TestUDPServer
     address = ('::1', 0)
 
     def setUp(self):