Message 171448 - Python tracker

After encountering an instance of people relying on fragment not being parsed for "irc://" URLs, with resulting breakage, I don't think we should change this in point releases.  IOW, it's fine for 3.3.0, but not for 2.7.x or 3.2.x.

It may be fixing a bug, but the bug is not obvious and the fix is not backward compatible.  I therefore suggest to roll back the commits to 3.2 and 2.7.