[jdk11u-dev] RFR: 8266949: Check possibility to disable OperationTimedOut on Unix

[Goetz Lindenmaier]

I downport this for parity with 11.0.13-oracle.

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Commit messages:
 - Backport e6705c0e4b548a83197c3ea70bdef25ec65d4c00

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/428/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=428&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266949
  Stats: 37 lines in 2 files changed: 14 ins; 17 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/428.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/428/head:pull/428

PR: https://git.openjdk.java.net/jdk11u-dev/pull/428