message: add shouldbreakafterconifg workaround to readme
diff: @@ -142,6 +142,14 @@ void configModeCallback (WiFiManager *myWiFiManager) {
  ##### Save settings
  This gets called when custom parameters have been set **AND** a connection has been established. Use it to set a flag, so when all the configuration finishes, you can save the extra parameters somewhere.
  +
  +IF YOU NEED TO SAVE PARAMETERS EVEN ON WIFI FAIL OR EMPTY, you must set `setBreakAfterConfig` to true, or else saveConfigCallback will not be called.
  +
  +```C++
  +//if this is set, it will exit after config, even if connection is unsuccessful.
  + void setBreakAfterConfig(boolean shouldBreak);
  +```
  +
  See [AutoConnectWithFSParameters Example](https://github.com/tzapu/WiFiManager/tree/master/examples/AutoConnectWithFSParameters).
  ```cpp
  wifiManager.setSaveConfigCallback(saveConfigCallback);
  