[jdk11u-dev] RFR: 8267256: Extend minimal retry for loopback connections on Windows to PlainSocketImpl

[Mat Carter]

Backport of JDK-8267256

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Depends on: https://git.openjdk.java.net/jdk11u-dev/pull/606

Commit messages:
 - Merge branch 'openjdk:master' into 8267256
 - Backport df332ff6e8bcee2cb5eeac1eefbc5c55a3fe8170
 - Backport 7e01bc967d00dce1791ef5cd31b8083751eb52e6
 - Backport c2fa441d8ded94241fdac7005d6420f99b38af0b

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/607/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=607&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8267256
  Stats: 109 lines in 4 files changed: 104 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/607.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/607/head:pull/607

PR: https://git.openjdk.java.net/jdk11u-dev/pull/607