RFR: 8319417: (dc) DatagramChannel.connect undocumented behavior

[Michael McMahon]

Hi,

This is a small doc change for DatagramChannel.getLocalAddress() and the equivalent methods on DatagramSocket which documents some existing (but not currently documented) behavior.

Thanks,
Michael

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Commit messages:
 - Alan round 2
 - Alan review
 - Merge branch 'master' into 8319417-datagram
 - update
 - update 1
 - spec update

Changes: https://git.openjdk.org/jdk/pull/16635/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16635&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319417
  Stats: 20 lines in 2 files changed: 19 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16635.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16635/head:pull/16635

PR: https://git.openjdk.org/jdk/pull/16635