message: added custom html param example pattern
diff: @@ -92,6 +92,7 @@ void setup() {
  WiFiManagerParameter custom_mqtt_port("port", "mqtt port", "", 6);
  WiFiManagerParameter custom_token("api_token", "api token", "", 16);
  WiFiManagerParameter custom_tokenb("invalid token", "invalid token", "", 0);
  + WiFiManagerParameter custom_ipaddress("input_ip", "input IP", "", 19,"pattern='\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'");
  // callbacks
  wm.setSaveConfigCallback(saveCallback);
  @@ -102,6 +103,7 @@ void setup() {
  wm.addParameter(&custom_mqtt_port);
  wm.addParameter(&custom_token);
  wm.addParameter(&custom_tokenb);
  + wm.addParameter(&custom_ipaddress);
  custom_html.setValue("test",4);
  custom_token.setValue("test",4);
  