in in6_pcbnotify, make sure we visit 2292bis-02(?) PMTU notificdation case.
in in6_pcbnotify, make sure we visit 2292bis-02(?) PMTU notificdation case.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame