Support for querying clock discipline system variables?

[tnn2]

Hi,

I wanted to use this package to monitor stratum 1 servers. There doesn't seem to be support for querying some fields useful for plotting the oscillator stability. I'm looking for in particular these fields reported by ntpq -c rv

• time constant
• frequency error
• system jitter
• clock jitter
• clock wander

Would you consider adding support for that?