[jdk11u-dev] RFR: 8054022: HttpURLConnection timeouts with Expect: 100-Continue and no chunking

[Anton Bobrov]

This is a backport of [4b02956d42c29ce32894f15411d3abe12b07dccd](https://git.openjdk.org/jdk/commit/4b02956d42c29ce32894f15411d3abe12b07dccd) / JDK-8054022 via existing backport to 17u-dev [78839e98155343078e5fba2a68f3bb6724c712d2](https://git.openjdk.org/jdk17u/commit/78839e98155343078e5fba2a68f3bb6724c712d2) / PR 2042 which applies here cleanly.

Testing: x86_64 build, affected tests, tier1

-------------

Commit messages:
 - Backport 4b02956d42c29ce32894f15411d3abe12b07dccd

Changes: https://git.openjdk.org/jdk11u-dev/pull/2523/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2523&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8054022
  Stats: 505 lines in 2 files changed: 466 ins; 7 del; 32 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2523.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2523/head:pull/2523

PR: https://git.openjdk.org/jdk11u-dev/pull/2523