enabled ISATAP just to prevent compilation failure (ToDo: move ISATAP-related sysctl into if_ist.c)
enabled ISATAP just to prevent compilation failure
(ToDo: move ISATAP-related sysctl into if_ist.c)

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