RFR: Clarifications and other changes

Wed May 18 23:04:54 UTC 2022

On Sun, 15 May 2022 14:27:00 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

> Several unrelated commits here, but each diff should be straight forward on its own.
> 
> 1. Fixed the commit message in the backout example to actually follow the structure described in that section.
> 2. A large part of the introduction was lost in the split into one file per chapter. Restored.
> 3. Added some more info to clarify the Author role and how to request it.
> 4. Added a small section describing the webrevs and the cr.openjdk.java.net server.
> 5. Removed the old files that hadn't been included into the guide earlier - the webrev and cr.ojn stuff was the last pice of info   missing from  those files.

Marked as reviewed by smarks (Committer).

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PR: https://git.openjdk.java.net/guide/pull/86