closes#10373
- ghost_head & ghost_foot are deprecated from now on
- we want to remove them in v3
- this short fix is dirty (!)
- we return codeinjection_* for admin & content api
- this is a consistentency change e.g. posts return `post.codeinjection_*`
- need to raise a decoupling refactoring issue for the code comments
refs #10318
- This settings endpoint returns the commonly used, public information from our settings.
- The values are whitelisted each with a custom name for returning from the endpoint
