RFR: 8278275: Initial nroff manpage generation for JDK 19

[David Holmes]

On Mon, 13 Dec 2021 05:51:37 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Trivial update to change the version to 19-ea, and update the single reference to the "current release".
> 
> Content changes for 19 will follow.
> 
> Thanks,
> David

Thanks for the reviews Erik, Jon and Iris!

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PR: https://git.openjdk.java.net/jdk/pull/6811