<!--- Verify first that your issue/request is not already reported in GitHub -->

##### SUMMARY
<!--- Explain the problem briefly here, details go way below -->

##### ISSUE TYPE
<!--- Pick one below and delete the rest: -->
 - Bug Report
 - Feature Idea
 - Documentation Report

##### DSTAT VERSION
```
<!--- Paste verbatim output from “dstat --version” here between tripple quotes -->
```

<!---
Test your issue using the latest release AND using the master branch code.
Download the latest release and the master branch from:

    https://github.com/dagwieers/dstat/releases
    https://github.com/dagwieers/dstat/archive/master.tar.gz

You can run dstat directly from the source tree using: ./dstat
Mention below which versions work correctly, or when it started to fail.
-->

##### OS / ENVIRONMENT
<!---
Mention the OS you are running Dstat from, and anything platform-specific
that could be related to your issue.
-->

##### STEPS TO REPRODUCE
<!---
For bugs, show exactly how to reproduce the problem.
For new features, show how the feature would be used.
-->

```
<!--- Paste example use or output here between quotes -->
```

<!--- You can also paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- What did you expect to happen when running the steps above? -->

##### ACTUAL RESULTS
<!--- What actually happened? Try running with debug enabled "dstat --debug" -->

```
<!--- Paste verbatim command output between quotes -->
```
