RFR: Section on backporting [v6]

[Jesper Wilhelmsson]

On Wed, 1 Dec 2021 18:03:33 GMT, Andrew John Hughes <andrew at openjdk.org> wrote:

>> src/index.md line 1504:
>> 
>>> 1502: ## Using the Skara tooling to help with backports
>>> 1503: 
>>> 1504: The Skara tooling includes support for backports. [The official Skara documentation](https://wiki.openjdk.java.net/display/SKARA/Backports) describes in detail how to work with the tooling to create backport PRs on GitHub or using the CLI tools. As described in the documentation, the [`/backport`](https://wiki.openjdk.java.net/display/SKARA/Commit+Commands#CommitCommands-/backport) command can be used on a commit (not a PR!) to create the backport PR. If a backport PR is manually created, set the title to `Backport <original commit hash>`.
>> 
>> Suggestion: "... set the PR title to `Backport <original commit hash>`. This ensures that the the bots will recognize it as a backport as opposed to a fix specifically targetting an older release only. One can tell whether or not the bots recognized a PR as a backport by the `backport` label being added if it is being recognized."
>
> +1

Thank you for this suggestion. Included.

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