[jdk8u-dev] RFR: 8291638: Keep-Alive timeout of 0 should close connection immediately

[Dhamoder Nalla]

Backport of 26ac8366360685ef0cf3447ee7db16ba7a7fa1ec

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Depends on: https://git.openjdk.org/jdk8u-dev/pull/453

Commit messages:
 - Backport 26ac8366360685ef0cf3447ee7db16ba7a7fa1ec

Changes: https://git.openjdk.org/jdk8u-dev/pull/454/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=454&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8291638
  Stats: 43 lines in 4 files changed: 35 ins; 6 del; 2 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/454.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/454/head:pull/454

PR: https://git.openjdk.org/jdk8u-dev/pull/454