RFR: Use https for all links

[Iris Clark]

On Thu, 9 Jul 2020 05:01:28 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

> Use https for all links

src/glossary.md line 46:

> 45:     The main Mercurial documentation is available at
> 46:     [https://hgbook.red-bean.com](https://hgbook.red-bean.com/).
> 47:

red-bean.com either doesn't support https or has a bad certificate.  Recommend this remain as "http" to avoid broken
link.

src/producingChangeset.md line 33:

> 32: required and a new changeset may be required to correct previous mistakes. The
> 33: [mq extension](https://hgbook.red-bean.com/hgbookch12.html#x16-26500012) is
> 34: recommended for managing changes before they become

red-bean.com does not appear to support https

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PR: https://git.openjdk.java.net/guide/pull/23