Fix redirect on openldap package download and add macOS docs

What does this Merge Request do?

I've started working on gitlab#212434 (closed) and noticed that I needed some tweaks to make the OpenLDAP setup work:

• Fix redirect on curl package download, seems the OpenLDAP server has an nginx in front now doing a 301
• Change daemon startup command and port for macOS
• Unsure if gdk.yml configuration is necessary

Merge Request checklist

• Tests added for new functionality. If not, please raise Issue to follow-up.
• This change is backward compatible. If not, please include steps to communicate to our users.
• Documentation added/updated, if needed.
• gdk doctor test added, if needed.

🛠 with ❤ at Siemens

/cc @bufferoverflow @rpaik