public int getPort() {
    return ((ServerConnector)(webServer.getConnectors()[0])).getLocalPort();
  }
Sets a valid X-Frame-option that can be used by HttpServer2.
@param option - String DENY, SAMEORIGIN or ALLOW-FROM are the only valid
              options. Any other value will throw IllegalArgument
              Exception.
@return  Builder.
common/src/java/org/apache/hive/http/HttpServer.java