RFR: Added JBS Label Dictionary

[Erik Helin]

On Tue, 1 Sep 2020 04:22:30 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

> Moving the JBS label Dictionary from the OpenJDK wiki into the Guide. Did some updates of the text.
> 
> I was unable to get the layout I wanted (or any readable layout really) using plain markdown, so this page uses an html
> table. If anyone can achieve the same or very similar layout using plain markdown I'd be happy to remove the html.
> I'm guessing this dictionary is missing several labels used by libraries and client since it has a hotspot background.
> Please let me know what labels to add (or just add them).
> I also moved the noreg-* description from "Change Planning" into this dictionary as I think it fits better here. All
> labels have anchors so you can link directly to any label in the dictionary.

Please ignore this comment, it is only for debugging Skara's e-mail bridging.

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PR: https://git.openjdk.java.net/guide/pull/26