> Replace open_exclusive() by fopen(name, "wb") on Windows: is it correct?

I reverted this change in my Mercurial branch (unicode_import).

> rename xxxobj => xxx to keep original names and have a short patch

done

> catch encoding errors in case_ok()

done

> don't encode in case_ok() if case_ok() does nothing (eg. on Linux)

done

> find a better name for find_module2()

done: find_module_path_list() and find_module_path()