Function arti::logging::logfile_layers

fn logfile_layers<S>(
    config: &LoggingConfig,
    mistrust: &Mistrust
) -> Result<(impl Layer<S>, Vec<WorkerGuard>)> where
    S: Subscriber + for<'span> LookupSpan<'span> + Send + Sync, 

Try to construct a tracing Layer for all of the configured logfiles.

On success, return that layer along with a list of WorkerGuards that need to be dropped when the program exits.