#3788: more tests for http.cookies, now at 95% coverage.  Also bring coding style in the module up to PEP 8, where it does not break backwards compatibility.

#9442: do not document a specific format for sys.version; rather refer to version_info and the platform module.

#9440: Remove borderline test case that fails based on unpredictable conditions such as compiler flags.

I removed the implicit conversion from str to bytes.

Copy Sun-specific inclusion of <alloca.h> from 2.7 maint to trunk; it seems to not have been merged to py3k.

Make urllib tests pass for now.  Will figure out what the correct semantics should be after release.

The concrete types are for internal use (registration).
We are not trying to resurrect the types module
in collections.