RFR: 8286983: Add mention of "Preview Feature" for new loom related jdb and debug agent options [v2]

Wed May 25 16:14:55 UTC 2022

On Wed, 25 May 2022 06:23:48 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> If virtual threads become permanent then the usage message would minimally be updated to drop the sentence that virtual threads are a preview feature.

But that's precisely the commitment to this flag that I want to avoid.  I want something that is the equivalent of `EXPERIMENTAL` for `-XX` flags.

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PR: https://git.openjdk.java.net/jdk/pull/8780