message: Allow environment-based overriding of configuration values
diff: @@ -46,7 +46,7 @@ pub enum Cli {
  /// Path to configuration file.
  config: Option<PathBuf>,
  - #[structopt(short = "C", long)]
  + #[structopt(short = "C", long, env = "NODE_CONFIG", use_delimiter(true))]
  /// Overrides and extensions for configuration file entries in the form
  /// <SECTION>.<KEY>=<VALUE>. For example, '-C=node.chainspec_config_path=chainspec.toml'
  config_ext: Vec<ConfigExt>,
  