Subject: [InfluxData Community] [Collect] Telegraf scale processor


Yeah, I agree that we need a processor for this.  We do have an issue open for a [math processor](https://github.com/influxdata/telegraf/issues/3709), but there are a few other possibilities for how this could be solved: we may introduce an exec processor that can run user scripts, or it could be a job for a [flux](https://github.com/influxdata/flux) processor.

Currently though the simplest solution would be to move this operation into the query:
```
SELECT (temp_kelvin - 2730) * 0.1 FROM mydevice
```

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