[Xymon] ntpq compatibility with chronyd

Hello all,

I update the ntpq script to work with chronyd (as I only use only chrony)

• Expect some bug with NTPd (As I did not test the ntpd part) -> Do not hesitate to report me some problems

https://github.com/bonomani/ntpq

And let me know if you found some optimisation or if you like it! Bonomani