Jürgen Baginski 27480ad208
[rrd4j] Updated readme (#8822)
Changed some wordings.

-Kept "DataSource" as the term for the way data is stored in a .rrd file. Such is more inline with the used Default Datasources (-numeric, ...).
-Removed the requirement for an everyMinute Strategy, inserted a explanation for relationship between Sample Intervall and Strategy instead.

Signed-off-by: Jürgen Baginski <opus42@gmx.de>
2020-10-30 23:26:21 +01:00
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