code: public ServerBuilder port(InetSocketAddress localAddress, SessionProtocol... protocols) {
          return port(new ServerPort(localAddress, protocols));
      }
docs: Adds a new {@link ServerPort} that listens to the specified {@code localAddress} using the specified
  {@link SessionProtocol}s. Specify multiple protocols to serve more than one protocol on the same port:
  
  <pre>{@code
  ServerBuilder sb = new ServerBuilder();
  // Serve both HTTP and HTTPS at port 8080.
  sb.port(new InetSocketAddress(8080),
  SessionProtocol.HTTP,
  SessionProtocol.HTTPS);
  // Enable HTTPS with PROXY protocol support at port 8443.
  sb.port(new InetSocketAddress(8443),
  SessionProtocol.PROXY,
  SessionProtocol.HTTPS);
  }</pre>