Py_Initialize(): Apply patch by Jürgen Hermann to call
    _PyImport_FixupExtension() on the exceptions module.  Now
    reload(exceptions) acts just like reload(sys) instead of raising
    an ImportError.

    This closes SF bug #422004.
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index f5fcaf1..f579f44 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -151,6 +151,7 @@
 
 	/* initialize builtin exceptions */
 	_PyExc_Init();
+	_PyImport_FixupExtension("exceptions", "exceptions");
 
 	/* phase 2 of builtins */
 	_PyImport_FixupExtension("__builtin__", "__builtin__");