editor and validator for systemd configuration files

 Config::Model::Systemd provides a configuration editor for the
 configuration files of systemd, (that is, all files in
 ~/.config/systemd/user/ or all files in /etc/systemd/system/).
 .
 The first paragraph is a simplified view.
 In more accurate and complicated words, this package provides the
 configuration model of Systemd configuration that cme,
 Config::Model and Config::Model::TkUI use to provide a configuration
 editor and checker.