RFR: 8209992: Align SSLSocket and SSLEngine Javadocs [v4]

[Artur Barashev]

> Add a javadoc paragraph to SSLSocket.startHandshake() and SSLEngine.beginHandshake() methods explaining behavioral differences between TLSv1.3+ and TLSv1.2- versions.

Artur Barashev has updated the pull request incrementally with one additional commit since the last revision:

  Address latest review commants

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26484/files
  - new: https://git.openjdk.org/jdk/pull/26484/files/8cf4e12f..5779ff34

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26484&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26484&range=02-03

  Stats: 4 lines in 2 files changed: 0 ins; 3 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26484.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26484/head:pull/26484

PR: https://git.openjdk.org/jdk/pull/26484