we do not use this corpus at all
not all Config::MVP could parse spaces in section names
recommend the use of with_recommends
check for dynamic_config => 0 everywhere
only pass args if they were explicitly included as constructor args
new -default feature, setting x_default in metadata (that nothing checks for yet)
note that the -default feature doesn't do anything yet
clarify that default is highly experimental
Dist-Zilla-Plugin-OptionalFeature-0.006

          - add test requirement on the minimal Config::MVP needed to handle
            an edge case that we test our handling of
          - new EXPERIMENTAL -default config option, instructing CPAN clients
            to install the features when running non-interactively