[collectd] Version 5.0.0.beta0 available

[Thorsten von Eicken]

Congrats! Can you provide a summary about the 4->5 compatibility and
migration? What is compatible with what? It gets a bit tricky when
considering that you changed a lot of the details how plugins report
data (e.g. to 'value' and derive instead of counter), that affects all
front-ends that display data. Also, what is the window for making
further changes to the way plugins report data?
Thanks!
Thorsten

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>    1. Version 5.0.0.beta0 available (Florian Forster)
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