RFR: 8209992: Align SSLSocket and SSLEngine Javadocs [v2]

[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 PR comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26484/files
  - new: https://git.openjdk.org/jdk/pull/26484/files/0a243a22..d5723cb8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26484&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26484&range=00-01

  Stats: 18 lines in 2 files changed: 7 ins; 0 del; 11 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