RFR: 8244669: convert clhsdb "mem" command from javascript to java [v4]

[Serguei Spitsyn]

On Tue, 21 Dec 2021 23:12:45 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

>> clhsdb lost support for the "mem" command when javascript support was removed from SA. This PR is re-adding it by implementing it in Java. The description of the CR contains all the details.
>> 
>> Regarding the clhsdb.html changes for the "examine" command, they are just correctly specifying the existing syntax. No change was actually made to the syntax.
>> 
>> The changes made to the "examine" command are part of a consolidation effort to better share code between "examine" and "mem". "examine" has no functional changes.
>
> Chris Plummer has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Minor improvements to help text for mem and examine.

Marked as reviewed by sspitsyn (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/6902