Julius Volz cb816ea14a Improve timestamp/duration parsing in query API.
Don't handle `0` as a special timestamp value for "now" anymore, except
in the `QueryRange()` case, where existing API consumers still expect
`0` to mean "now".

Also, properly return errors now for malformed timestamp/duration
float values.
2015-03-21 16:58:45 +01:00
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