main
Move init.d and sudo.pp to the etc dir.
Pass "make spell" with updated codespell.
Quiet codespell 2.3.0 complaints.
Rename "doc" directory to "docs" for better GitHub compatibility.
Add a background image for the macOS installer.
For rpm platforms use /etc/os-release to get the major version number
Don't enable mod_remove_empty_return We like to use an empty return for stub functions.
