[jdk20] RFR: 8299015: Ensure that HttpResponse.BodySubscribers.ofFile writes all bytes

Wed Dec 21 23:16:41 UTC 2022

Hi all,

This pull request contains a backport of commit [a7d6de71](https://github.com/openjdk/jdk/commit/a7d6de71bb83c8715654f61dd166aad6e8dab847) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Chris Hegarty on 21 Dec 2022 and was reviewed by Daniel Fuchs, Daniel Jeliński and Jaikiran Pai.

Thanks

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Commit messages:
 - Backport a7d6de71bb83c8715654f61dd166aad6e8dab847

Changes: https://git.openjdk.org/jdk20/pull/70/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20&pr=70&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299015
  Stats: 42 lines in 3 files changed: 39 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk20/pull/70.diff
  Fetch: git fetch https://git.openjdk.org/jdk20 pull/70/head:pull/70

PR: https://git.openjdk.org/jdk20/pull/70