RFR: 8276549: Improve documentation about ContainerPtr encoding [v2]

[Thomas Schatzl]

On Mon, 23 May 2022 08:46:28 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add "Free" to Howl container doc
>
> Marked as reviewed by kbarrett (Reviewer).

Thanks @kimbarrett @walulyai for your reviews

-------------

PR: https://git.openjdk.java.net/jdk/pull/8811