Xavier Morel
01e3514147
In Python 3, all of these were "consolidated" under urllib(.request, .parse, .errors) which is inconvenient. Since we already have hard dependencies on requests and werkzeug(.urls, which is a backport of Python 3's unicode-aware urllib.parse) migrate *everything* to that. A sticking point is urllib2.URLError, those were (mostly) replaced by the slightly more general IOError which URLError extends.