RFR: 8366157: Clarify in man pages that only G1 supports MaxGCPauseMillis

[Thomas Schatzl]

On Thu, 28 Aug 2025 08:38:42 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Actually we can leave this sentence completely out.
>
> Typically heuristically determined values have a default value of `0`, with a clear indication that the actual value is determined ergonomically.

Actually, we should probably also remove the "Currently" of the last sentence because we do not want/need to give indications about future support for other collectors.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26940#discussion_r2306800822