[11u] RFR: 8265099: Revert backport to 11u of 8236859: WebSocket over authenticating proxy fails with NPE

[Hohensee, Paul]

The recent backport of 8236859 to 11.0.12 causes tier2 failures in java/net/httpclient. I’d like to revert the backport for now.

Original issue: https://bugs.openjdk.java.net/browse/JDK-8236859
Original patch: https://hg.openjdk.java.net/jdk/jdk/rev/ed8e7bf32188

11.0.12 backport issue: https://bugs.openjdk.java.net/browse/JDK-8264988
11.0.12 patch: https://hg.openjdk.java.net/jdk-updates/jdk11u-dev/rev/57e3fa3574ec

Reversion issue: https://bugs.openjdk.java.net/browse/JDK-8265099
Reversion webrev: https://cr.openjdk.java.net/~phh/8265099/webrev.11u.00/

Thanks,
Paul