move KAME origined IN6P_xxx flags to upper 16 bits. XXX: Should IN6P_HIGHPORT and IN6P_LOWPORT be moved as well?
move KAME origined IN6P_xxx flags to upper 16 bits.
XXX: Should IN6P_HIGHPORT and IN6P_LOWPORT be moved as well?

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