RFR: 8320971: Use BufferedInputStream.buf directly when param of implTransferTo() is trusted [v3]

[Vladimir Sitnikov]

On Mon, 4 Dec 2023 13:58:45 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>The backing array is not frozen so a read-only view doesn't address the second part of the concern where the target keeps a reference.

The users outside of OpenJDK would not have a reference to `byte[]`.
Do you mean a reference to `ByteBuffer`?
What if there was a `ByteBuffer#forbidReads()` method that would permanently forbid subsequent reads from the `ByteBuffer`?

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PR Review Comment: https://git.openjdk.org/jdk/pull/16879#discussion_r1413921224