RFR: Section on backporting [v7]

[Jesper Wilhelmsson]

On Thu, 2 Dec 2021 23:02:30 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> The redo will use a different main bug IDs, so I don't see that this adds confusion. Your earlier point is probably enough of a reason to do what you suggest.

I would expect the redo issue in this case to be a new backport issue from the same main issue.

> Btw, I wouldn't suggest deleting the backport relationship for a bug that has been backed out in mainline (shortly) after it was backported, and thus backed out in the update release as well. What you propose makes sense only for bugs that remain in mainline but not in one or more of the update releases. This should be very rare for the reasons you mentioned earlier, but it can happen.

Right, I totally agree.

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PR: https://git.openjdk.java.net/guide/pull/66