draft-06 plus last-call changes

I have made changes for the editorial comments received during
the last call period so far, as described in

    http://gbiv.com/protocols/uri/rev-2002/issues.html

to my author's draft at

    http://gbiv.com/protocols/uri/rev-2002/issues.html

A diff from draft 06 can be seen at

    http://gbiv.com/protocols/uri/rev-2002/diff-draft-06

Please review.

....Roy