* Updated urllib + urllib tests
* Updated http + test
* Annotated failing tests
* Fixed issues in httpservers, robotparser and urllib2net
* Fixed windows only success
* Annotated flaky test in test_logging
Initially this is only meant to be a small update for `test_io.py`.
But it turns out that `test.support` need a lot of cleanup especially
for `test.support.warnings_helper`.