handbook: ipv6

[Marc Blanchet]

Hi,
- the IPv6 page in the handbook is short (no criticism intended). I think
it needs more content about things to consider, the various config knobs
(/etc/rc.conf), ...
- if you like, I could contribute. 
- my credentials in short:
 + author of 3 RFC, one is about IPv6 addressing RFC 3531, many drafts.
 + co-chair of the ipv6 exchange adhoc wg.
 + early participant and contributor to Ipv6 deployment (since 1995). 
 + so many ipv6 presentations done in conferences
 + co-author of ipv6 tutorials, one is the cisco ipv6 course.
 + finishing writing a book on ipv6 to be published by Wiley (with examples
on freebsd, of course!!! ;-)))
 + user of freebsd for everything, daily environment.

Marc.