I noticed the doc/development/testing_guide/best_practices.md still
referenced the `[run mysql]` tags, etc. They no longer work, so I
removed them, then realised I had better clean up the rest of
doc/development !

The githost.log name was often confused with GitHost.io. Rename this to
git_json.log to make it clear it's coming from Git and that it's JSON
data.

Code blocks should not be spaced 4 times, as this will
prevent the code from being colored. They should
also be spaced the same as the lists they are a part
of, to make reading easier.

Fixing square brackets, links, etc in:
  merge_requests.md
  vulnerabilities.md
  issues.md
  issues_statistics.md
  pipelines.md
  services.md
  group_milestones.md
  milestones.md
  runners.md
  changelog.md
  issue_workflow.md
  elasticsearch.md
  api_graphql_styleguide.md
  automatic_ce_ee_merge.md
  file_storage.md
  architecture.md
  database_debugging.md
  index.md
  index.md
  frontend_testing.md
  pry_debugging.md
  vue.md
  development_process.md

Linting rule not enabled for now
because tooling produces false
positives.

Adjusts asterisks to hyphens in assorted docs to allow lint rule to pass

Signed-off-by: NTakuya Noguchi <takninnovationresearch@gmail.com>

This commit checks off two of the three components in the table that we
added for the CEO Challenge in Contribute 2019:

* Grafana:
  https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/3272

* GitLab Monitor:
  https://gitlab.com/charts/gitlab/merge_requests/787

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

- Wrap text
- Move image to /img/

By default, all tables have a width of 100% on docs.gitlab.com.
In a few cases, the table will overlap the table of contents (ToC).
For these cases, we need to add an entry to the document’s frontmatter
to render them as a display block.

Using Geo with source-based installs was deprecated in GitLab 11.5.

This commit removes this support now that the deprecation notice has
been in place for quite a few releases.

This is part of https://gitlab.com/gitlab-org/gitlab-ce/issues/61945

This reverts merge request !28188

Signed-off-by: NTakuya Noguchi <takninnovationresearch@gmail.com>

For the sake of consistency, removes any extraneous
consecutive blank lines from the doc suite.

Signed-off-by: NTakuya Noguchi <takninnovationresearch@gmail.com>