Tentative first patch for FAST_IPSEC with IPv6

[gnn at freebsd.org]

Howdy,

There is now a patch at

http://people.freebsd.org/~gnn/fast_ipv6.patch

which should allow you to run FAST_IPSEC with IPv6.  It is very new,
it has passed most TAHI tests, and does not, so far as I know, panic
the kernel.  This is a patch against HEAD.

Please test and send feedback.

There is still more to do but at least this is now starting to work.

Later,
George