[ppml] IPv6>>32

[Randy Bush]

> Yes stewardship is about resource management so that it is available
> in the future, but is also about allowing current use of the resource
> in ways that don't artificially constrain innovation to past practice.

this deserves one concrete example where it is doing so.  otherwise it's
all outer space where we have no idea what we could or should be doing
other than the current v6 marketing smoke, build it and they will come.

randy