cascading python executions only if return code is 0

[Chris Angelico]

On Fri, Dec 27, 2013 at 3:29 PM, Roy Smith <roy at panix.com> wrote:
> NTP is never supposed to move the clock backwards.  If your system clock
> is fast, it's supposed to reduce the rate your clock runs until it's
> back in sync.  Well, maybe it only does that for small corrections?

The exact rules are tweakable, but yes, it slews for small corrections
and steps for larger ones.

ChrisA