RFR: 8315436: HttpsServer does not send TLS alerts

[Daniel Jeliński]

Please review this patch that ensures that alerts produced by `wrap` are sent to the peer.

When a fatal alert is produced by a `wrap` call, the returned status is `CLOSED`, but some bytes are produced in the destination buffer. These bytes need to be sent to the client.

The new test verifies this fix; without the fix the test fails with:

javax.net.ssl.SSLHandshakeException: Remote host terminated the handshake

With the fix the test passes; the exception thrown is :

javax.net.ssl.SSLHandshakeException: Received fatal alert: protocol_version

Existing tier1-3 tests continue to pass.

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Commit messages:
 - Update copyright
 - Send TLS alerts

Changes: https://git.openjdk.org/jdk/pull/15505/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15505&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315436
  Stats: 112 lines in 2 files changed: 110 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15505.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15505/head:pull/15505

PR: https://git.openjdk.org/jdk/pull/15505