RFR: 8305758: Update the man page to indicate -i/--generate-file is deprecated

Sat Apr 8 11:56:49 UTC 2023

On Sat, 8 Apr 2023 10:33:48 GMT, Lance Andersen <lancea at openjdk.org> wrote:

> Hi all,
> 
> Please review this MR which updates the jar man page to to indicate that  --generate-index/-I are deprecated and may be removed in a future release
> 
> Support for JAR Index is being removed via JDK-8302819.

The JBS issue name should be updated to use a lowercase `-i` and this PR's title should be updated to match the JBS title.

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PR Comment: https://git.openjdk.org/jdk/pull/13400#issuecomment-1500875207