Refactor ntpd to support multiple servers
Refactor ntpd to support multiple servers

qxo/boot2docker,kxes/docktop-os,jd-daniels/boot2docker,power-dev-env/boot2docker,dweinstein/boot2docker,jd-daniels/boot2docker,tianon/boot2docker-legacy,dweinstein/boot2docker,SvenDowideit/boot2docker,whuwxl/boot2docker,qxo/boot2docker,power-dev-env/boot2docker,whuwxl/boot2docker,SvenDowideit/boot2docker,boot2docker/boot2docker