RFR: Populating the repo with the old html guide files.

[Iris Clark]

On Fri, 8 May 2020 14:48:21 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

> Adding the old guide files.

Thanks so much for working to update this document!  I look forward to seeing it evolve to describe our latest
practices for development.

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Marked as reviewed by iris (Reviewer).

PR: https://git.openjdk.java.net/guide/pull/1