- Split access and authentication into another heading,
  to prepare for description of SSH keys and PATs, see #18.

- Also add links to Wikipedia as first info source.

- Some more fixes along the way.

- Also, some fixes here and there.

- See issue #14.

- Issue -> Ticket
- Merge request -> Merge-Request.

- Jeder Satz in eigener Zeile.
- Keine inhaltlichen Änderungen.

- Jeder Satz in einer Zeile.
- Keine inhaltliche Änderung.
- Markdown-Überschriften wie im Rest des Repos.

- this would be nice to retain explicit header ids/ internal link names

See #12.