RFR: 8295857: Clarify that cleanup code can be skipped when the JVM terminates (e.g. when calling halt())

[Lance Andersen]

On Thu, 17 Nov 2022 19:25:42 GMT, Brent Christian <bchristi at openjdk.org> wrote:

> [JDK-8290036](https://bugs.openjdk.org/browse/JDK-8290036) documented the shutdown sequence, noting that calling Runtime.halt() skips the shutdown sequence and immediately terminates the VM. Thus, "threads' current methods do not complete normally or abruptly; no finally clause of any method is executed".
> 
> One ramification of this is that resources within try-with-resource blocks will not be released. It would be good to state this explicitly.

Changes requested by lancea (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/11218