[jdk15u-dev] RFR: 7146776: deadlock between URLStreamHandler.getHostAddress and file.Handler.openconnection

[Yuri Nesterenko]

applied as clean or more as for 13u (a context copyright difference only).

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Commit messages:
 - Backport db9c114d40cd20c2854121ed8b40a7c9ef8e59b3

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/4/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=4&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-7146776
  Stats: 45 lines in 2 files changed: 25 ins; 15 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/4.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/4/head:pull/4

PR: https://git.openjdk.java.net/jdk15u-dev/pull/4