RFR: 8303682: Simplify HttpClient DebugLogger [v3]

[Jaikiran Pai]

On Wed, 8 Mar 2023 11:37:03 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> The HttpClient internal DebugLogger could be simplified if its configuration was held in a record. Some of the methods in Utils that return a debug logger could also be simplified/removed. The system property that configures the debug logging could be extended to choose between System.err, System.out, System.Logger, or any of these configurations.
>> Passing -Djdk.internal.httpclient.debug=true still works as before.
>
> Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use HashSet.newHashSet(capacity)

Thank you Daniel for the changes. The latest state in commit `0adb05bb` looks good to me.

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Marked as reviewed by jpai (Reviewer).

PR: https://git.openjdk.org/jdk/pull/12900