old_contents: exports.key = './server.key';
  exports.cert = './server.crt';
  exports.port = 8443;
  exports.ircPort = 6697;
  exports.ircHost = 'irc.example.net';
  exports.password = "foobar";
  exports.redirectUrl = "http://webirc.oftc.net";
  exports.module = 'ws';
  exports.reconnectTime = 15 * 1000;
  
new_contents: module.exports = {
    listeners: {
      '0.0.0.0': {
        type: 'plain',
        port: 6667,
      },
    },
    destination: {
      host: 'irc.example.com',
      port: 6667,
      type: 'plain',
    },
    reconnectTime: 15 * 1000,
    dnsbl: {
      maxScore: 1,
      servers: {
        'somednsbl': {
          zone: 'dnsbl.example.com',
          defaultScore: 1,
        },
      },
    },
  };
  
subject: update config