There's lots of (YAML) test data that is just trivial configurations
for modules. Since the configurations themselves are **also** CC0-1.0,
and the tests are less interesting, license them equally liberally.
- Check for 'list' when it's actually a 'dict' is strange.
Reverse logic to consider 'str' a package name and everything
else is special.
- Refactor to handle the difference between package names and
packages-with-script-data in one place.
- Add code and config documentation.
- Switch sample configurations to dummy-backend.
the docs do not current reflect the new net-install and packages modules
changes well. This updates them to explain the new keys in the
configuration files.
