[minor] use servers in /etc/ntp.conf for timedrift, fixes #116
[minor] use servers in /etc/ntp.conf for timedrift, fixes #116

Instead of picking ntp servers randomly from a hardcoded list we now
prepend our hardcoded list with the servers defined in /etc/ntp.conf and
then try each server sequentially until we find one that works.

therealkbhat/mig,mozilla/mig,mozilla/mig,ameihm0912/mig,rezen/mig,sunnygkp10/mig,jboyer2012/mig,vladimirdiaconescu/mig,mozilla/mig,ameihm0912/mig,jboyer2012/mig,mozilla/mig,rezen/mig,sunnygkp10/mig,vladimirdiaconescu/mig,yvesago/mig,yvesago/mig,rezen/mig,therealkbhat/mig,rezen/mig,sunnygkp10/mig,sunnygkp10/mig,mozilla/mig,vladimirdiaconescu/mig,therealkbhat/mig,jboyer2012/mig,yvesago/mig,jboyer2012/mig,yvesago/mig,vladimirdiaconescu/mig,ameihm0912/mig,therealkbhat/mig