RFR: Add start on a section about logging

[Jesper Wilhelmsson]

On Mon, 20 Dec 2021 12:46:10 GMT, David Holmes <david.holmes at oracle.com> wrote:

> Sorry but this hotspot specific development detail seems completely out of place in this guide. There should be a hotspot development guide where this would be a valid section - but right now we only have (some out-dated) wikis on hotspot development.

I think area specific content can be part of the Developers' Guide. There's already some, and I've gotten several inquiries to add more on the specific rules around area specific practice and process. I like this section as it's a first step towards actual development guidance. Most of the guide has been focused on process so far.

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PR: https://git.openjdk.java.net/guide/pull/70