Import ntp 4.2.0
Import ntp 4.2.2
Import ntp 4.2.2p2
Import ntp 4.2.4
Import ntp 4.2.4p2
Import ntp 4.2.4p5
Import ntp 4.2.4p6
Import ntp 4.2.4p7
Import ntp 4.2.4p8
Import ntp 4.2.6
Import ntp 4.2.6p5
import devel ntpd to avoid amplification attacks.