[jdk13u-dev] RFR: 8266949: Check possibility to disable OperationTimedOut on Unix

[Yuri Nesterenko]

I'd like to backport this fix for consistency. The patch applies cleanly after 8196100 in both repositories, some obvious related tests do pass

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Commit messages:
 - Backport e6705c0e4b548a83197c3ea70bdef25ec65d4c00

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/289/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=289&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/jdk13u-dev/pull/289.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/289/head:pull/289

PR: https://git.openjdk.java.net/jdk13u-dev/pull/289