[jdk11u-dev] RFR: 8282017: sun/net/www/protocol/https/HttpsURLConnection/B6216082.java fails with "SocketException: Unexpected end of file from server"

[Amos Shi]

Backport of [JDK-8282017](https://bugs.openjdk.org/browse/JDK-8282017)

Testing
- Local: Not applicable
  - Not a test or directory containing tests: sun/net/www/protocol/https/HttpsURLConnection/TunnelProxy.java
- Pipeline: 
- Testing Machine:

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Commit messages:
 - Backport cd9a3cf05b2c200709103e2e8596414a62a1c441

Changes: https://git.openjdk.org/jdk11u-dev/pull/2650/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2650&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8282017
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2650.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2650/head:pull/2650

PR: https://git.openjdk.org/jdk11u-dev/pull/2650