(when new sa is preferred than old sa) even if we fail to send pfkey message, remove the old sa.
(when new sa is preferred than old sa)
even if we fail to send pfkey message, remove the old sa.

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