ESP32 memory leaks WIFI and MQTT

Hi!

Just connecting to the AP, and then saving Wifi credentials with Wifi.save() was the best for me.
Wifi tries to reconnect if disconnected from the AP without any explicit code. Connect and reconnect sometimes completes quickly, sometimes it takes longer. And this can mess if you have timed reconnects.

Also, in the function

function iw2(){
  if(wifi_stat !== "connected") {
    wifi_recon_count++;
    wifi_pre_mem = process.memory().free;
    print("WIFI disconnected: Reconecting...");
    Wifi.connect(wifi_options.ssid, {password: wifi_options.password});
    wifi_post_mem = process.memory().free;
  }
  setTimeout(iw2,1000*30);
}

The status can be for example connecting, if the function runs just after a random disconnect, while the ESP is still trying to connect. Calling Wifi.connect() while connecting caused all kinds of strange behaviour for me.