RFR: 8302659: Modernize Windows native code for NetworkInterface [v4]

[Rich DiCroce]

> Improves performance and correctness, as discussed on the net-dev mailing list.

Rich DiCroce has updated the pull request incrementally with one additional commit since the last revision:

  Changes as per review comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12593/files
  - new: https://git.openjdk.org/jdk/pull/12593/files/da66b503..f2ce5aa2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12593&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12593&range=02-03

  Stats: 86 lines in 2 files changed: 48 ins; 26 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/12593.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12593/head:pull/12593

PR: https://git.openjdk.org/jdk/pull/12593