RFR: 8336817: DatagramSocket.connect does not specify behavior when already connected [v5]

[Jaikiran Pai]

> Can I please get a review of this doc-only change which updates the javadoc on several methods of the `java.net.DatagramSocket` class to match its current implementation?
> 
> This addresses https://bugs.openjdk.org/browse/JDK-8336817.
> 
> I'll open a CSR once we settle on the proposed text.

Jaikiran Pai has updated the pull request incrementally with one additional commit since the last revision:

  address javadoc on methods of MulticastSocket too

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/20543/files
  - new: https://git.openjdk.org/jdk/pull/20543/files/d9bac1bf..bfdd7773

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20543&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20543&range=03-04

  Stats: 16 lines in 1 file changed: 2 ins; 1 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/20543.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20543/head:pull/20543

PR: https://git.openjdk.org/jdk/pull/20543