Initial implementation

Description

We need the NTP!

Proposal

API:

• ntp_time_servers - get time from servers ([])
• ntp_time_serving_networks - give time to hosts in networks ([])

Example:

ntp_time_servers:
  - "ntp.task.gda.pl"
  - "1.2.3.4"
ntp_time_serving_networks:
  - "10.0.0.0/24"
  - "1.0.0.0/30"