Add MQTT TLS Support for WIFI-Enabled Devices (#2410)

* Testing TLS MQTT Support

* Working TLS connections

* Testing TLS MQTT Support

* Working TLS connections

* Added protobuf support for mqtt.tls_enabled

* fix 'em up good

* don't commit this stuff, jeeez

* there i fixed it

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>

src/mqtt/MQTT.h

@@ -8,6 +8,9 @@
 #include <PubSubClient.h>
 #if HAS_WIFI
 #include <WiFiClient.h>
+#if !defined(ARCH_PORTDUINO)
+#include <WiFiClientSecure.h>
+#endif
 #endif
 #if HAS_ETHERNET
 #include <EthernetClient.h>
@@ -23,9 +26,11 @@ class MQTT : private concurrency::OSThread
 {
     // supposedly the current version is busted:
     // http://www.iotsharing.com/2017/08/how-to-use-esp32-mqtts-with-mqtts-mosquitto-broker-tls-ssl.html
-    // WiFiClientSecure wifiClient;
 #if HAS_WIFI
     WiFiClient mqttClient;
+#if !defined(ARCH_PORTDUINO)
+    WiFiClientSecure wifiSecureClient;
+#endif
 #endif
 #if HAS_ETHERNET
     EthernetClient mqttClient;
@@ -87,4 +92,4 @@ class MQTT : private concurrency::OSThread
 
 void mqttInit();
 
-extern MQTT *mqtt;
+extern MQTT *mqtt;