Currently we enable extra modules by specifying the full string that is passed to configure. It would be much cleaner to specify them by a simple bool. As part of this we also may wish to revisit which modules are enabled by default.

Compare the two following YAML snippets.

nginx_source_modules_included:
  http_stub_status_module: "--with-http_stub_status_module"

nginx_source_modules_included:
  http_stub_status_module: yes