r54137 replaced a comment in urllib2.py with a misleading comment.  The
comment now implies the .insort() in question achieves the goal
specified in the new comment.  That's not true, which was the reason the
original comment was there in the first place.

At least replace the comment with the original comment.  Alternatively,
(correctly) resolve the question in the original comment somehow (for
example by removing the .handlers attribute -- but since .handlers is
misnamed in not having an initial underscore, it may have tempted people
to use it, even though it's undocumented, hence private).