RFR: 8303682: Simplify HttpClient DebugLogger

[Jaikiran Pai]

On Tue, 7 Mar 2023 10:16:24 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.

test/jdk/java/net/httpclient/DebugLoggerTest.java line 242:

> 240:         out =  new RecordingPrintStream(stdOut, true, UTF_8);
> 241:         System.setErr(err);
> 242:         System.setOut(out);

Should we reset these back to their original streams in a `finally` block?

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