Now MySQL is no longer supported, we need to change the docs

Marcia Ramos authored 5 years ago and Achilleas Pipinellis committed 5 years ago

Remove redundancies:
- Domains
- User/group/project sites

GitLab Pages supports projects hosted under a subgroup, but not subgroup
websites. That means that only the highest-level group supports

i.e.:
You created a group for your engineering department called
`engineering`, a subgroup for all your documentation websites called
`docs`,and a project within this subgroup is called `workflows`.
Your project URL is `https://gitlab.com/engineering/docs/workflows/`.
Once you enable GitLab Pages for this project, the site will live under
`https://engineering.gitlab.io/docs/workflows`.

- Also makes other minor Markdown fixes that were near the main fixes.

Issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/30473
MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14046

This reverts commit b0498c17

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