message: Be more elaborate in documentation on logging init
diff: @@ -106,7 +106,10 @@ where
  /// Initializes the logging system.
  ///
  -/// This function should only be called once during the lifetime of the application.
  +/// This function should only be called once during the lifetime of the application. Do not call
  +/// this outside of the application or testing code, the installed logger is global.
  +///
  +/// See the `README.md` for hints on how to configure logging at runtime.
  pub fn init() -> anyhow::Result<()> {
  let formatter = format::debug_fn(|writer, field, value| {
  if field.name() == "message" {
  