RFR: Section on backporting [v6]

[Jesper Wilhelmsson]

On Wed, 1 Dec 2021 18:01:30 GMT, Andrew John Hughes <andrew at openjdk.org> wrote:

>> src/index.md line 1501:
>> 
>>> 1499: 
>>> 1500: In order to be allowed to push a change to one of the OpenJDK Update Release repositories, an approval is required. The [official process for how to request push approval for a backport](https://openjdk.java.net/projects/jdk-updates/approval.html) describes in detail how to work with JBS when requesting approvals. In short, there's a label `jdk<release>u-fix-request` that should be added to the main JBS issue. Also put a motivation as to why the issue needs to be backported as a comment in the main issue. Once the label and motivation has been added, wait for the maintainers of the release to approve your request. The approval will be indicated with a label, `jdk<release>u-fix-yes`, added to the main issue.
>>> 1501: 
>> 
>> Hi,
>> I would propose to differ the development and release
>> repositories most update projects use (like jdk11u-dev and jdk11u).
>> 
>> In this case, in the first sentence, it should say 
>> "... OpenJDK Update **Development** repositories ..."
>> 
>> and at the end you could add
>>   If an update is in rampdown in the Release repository, 
>>   urgent fixes need to be approved with
>>   `jdk<release>u-critical-request` / `jdk<release>u-critical-yes`.
>> 
>> If you want to keep it short, omitting this is ok.  But this is 
>> also missing on the "JDK Updates: Requesting push approval for fixes"
>> wiki page referred to from here.
>
> +1

Thank you for these suggestions! I have included this.

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