Add 'XXX FIXME' comments to ah4_ctlinput(), esp4_ctlinput()
ipcode-paths merely cast away local variables ip, ah/esp, sav; the
fast-ipsec IPv4 code appears to work even so.
In espv6_ctlinput(), call the fast-ipsec KEY_ALLOCSA()/KEY_FREESA()
macros, not the KAME-native key_allocsa()/key_freesa() functions.
Cast sa6_src/sa6_dst to void; the fast-ipsec API does not (yet) pass
both src and dst addrs to KEY_d-ALLOCSA/KEY_FREESA.
Make sure 'off' is set to 0 on the branch where it was formerly
used-before-set.
Will now compile with ``options INET6'' (as in
sys/arch/i386/conf/GENERIC.FAST_IPSEC), but is not yet
expected to acutally work with IPv6.
5093b79faa