0.6 (2020-06-11)
- fix reported polling interval with ntpd and PPS source

0.5 (2018-03-20)
- add -m option to specify maximum acceptable error

0.4 (2017-07-11)
- include system offset in reported distance with chrony
- fix parsing of delay and dispersion from chronyc output

0.3 (2017-03-15)
- initial release
