docs: private void startRelayWithPortTollerance(HttpServer server, SslListener relay, int tries) throws Exception {
          if (tries >= 5) {
              throw new BindException("Unable to bind to several ports, most recently " + relay.getPort() + ". Giving up");
          }
          try {
              if (server.isStarted()) {
                  relay.start();
              } else {
                  throw new RuntimeException("Can't start SslRelay: server is not started (perhaps it was just shut down?)");
              }
          } catch (BindException e) {
              // doh - the port is being used up, let's pick a new port
              LOG.info("Unable to bind to port %d, going to try port %d now", relay.getPort(), relay.getPort() + 1);
              relay.setPort(relay.getPort() + 1);
              startRelayWithPortTollerance(server, relay, tries + 1);
          }
      }