version numbers

[Erik Ostrom <eostrom@research.att.com>]

i made these remarks to dave already, but here they are again.

i think the spec shouldn't allow version numbers, but i'd like it to
be possible to implement version numbers as signed integers (for
languages that don't have native support for unsigned integers, ha ha
ha, how ridiculous).  so my vote is that you state that version
numbers can range from 0 to 2147483647, and change 'unsigned integers'
to 'integers'.  yes, you could consider them unsigned since there
aren't any negative ones, but it sounds too much like an
implementation detail.

--erik