Miroslav Lichvar dec07aa844 sourcestats: don't fudge refclock LastRx in sources report ...

The sample time used in calculation of the last_meas_ago (LastRx) value
in the sources report is aligned to the second to minimize the leak
of the NTP receive timestamp, which could be useful in some attacks.

There is no need to do that with reference clocks, which are often used
with very short polling intervals and an extra second in the LastRx
value can be misinterpreted as a missed sample.

2023-02-02 11:26:04 +01:00

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