RFR: 8296804: Document HttpClient configuration properties in java.net.http module-info

[Michael McMahon]

Hi,

Could I get the following doc change reviewed please? It documents the system/networking properties used by the java.net.http HTTP client in its module-info. (CSR to follow)

Thanks,
Michael

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Commit messages:
 - first draft

Changes: https://git.openjdk.org/jdk/pull/11241/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11241&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296804
  Stats: 119 lines in 1 file changed: 118 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/11241.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11241/head:pull/11241

PR: https://git.openjdk.org/jdk/pull/11241