[jdk11u-dev] RFR: 8269258: java/net/httpclient/ManyRequestsLegacy.java failed with connection timeout

[Amos Shi]

Backport of [JDK-8269258](https://bugs.openjdk.org/browse/JDK-8269258)

Testing
- Local: Test passed
  - `ManyRequests.java`: Test results: passed: 1
  - `ManyRequests2.java`: Test results: passed: 1
  - `ManyRequestsLegacy.java`: Test results: passed: 1
- Pipeline: 
- Testing Machine:

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Commit messages:
 - jdk11u-dev Convert record to class
 - Backport 37921e30803449c06b4d542fdfeed9928cce8a7d Manual Merge
 - Backport 37921e30803449c06b4d542fdfeed9928cce8a7d

Changes: https://git.openjdk.org/jdk11u-dev/pull/2696/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2696&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8269258
  Stats: 319 lines in 3 files changed: 203 ins; 36 del; 80 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2696.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2696/head:pull/2696

PR: https://git.openjdk.org/jdk11u-dev/pull/2696