RFR: 8283779: Clarify API documentation of NetworkInterface with respect to configuration changes [v6]

[Daniel Fuchs]

> Please find here a change that adds a few `@apiNote` and `@implNote` to `NetworkInterface` to clarify user expectation and implementation.

Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:

  Fix typo

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/20822/files
  - new: https://git.openjdk.org/jdk/pull/20822/files/faf37307..d5c7710c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20822&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20822&range=04-05

  Stats: 5 lines in 1 file changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/20822.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20822/head:pull/20822

PR: https://git.openjdk.org/jdk/pull/20822