RFR: 8344056: Use markdown format for man pages [v2]

[Magnus Ihse Bursie]

On Thu, 14 Nov 2024 12:29:38 GMT, Christian Stein <cstein at openjdk.org> wrote:

> Now `CheckManPageOptions` finds the `.md` file (good) and its checks fail (bad). 

*sigh*

> A candidate for an ignore list as fixing it is out of scope of this PR?

Let me have a look at it first. It seems the test has the indention to handle markdown files, so maybe there is an easy fix.

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PR Comment: https://git.openjdk.org/jdk/pull/22081#issuecomment-2476258243