[jdk11u-dev] RFR: 8220673: Add test library support for determining platform IP support [v2]

[Andrew Lu]

> I backport this for parity with 11.0.25-oracle.
> these tests are not clean, but all added code is clean
> test/jdk/java/net/NetworkInterface/Test.java
> test/jdk/java/net/Socket/CloseAvailable.java
> test/jdk/java/net/Socket/HttpProxy.java
> test/jdk/java/net/Socket/SetSoLinger.java
> test/jdk/java/nio/channels/DatagramChannel/Disconnect.java
> 
> this class is not exist, ignore, other classes are clean
> test/jdk/java/nio/channels/etc/PrintSupportedOptions.java

Andrew Lu has updated the pull request incrementally with one additional commit since the last revision:

  fix

-------------

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/2910/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/2910/files/20d6ea1a..11b6db11

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2910&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2910&range=00-01

  Stats: 75 lines in 51 files changed: 21 ins; 1 del; 53 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2910.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2910/head:pull/2910

PR: https://git.openjdk.org/jdk11u-dev/pull/2910