Ignore MQTT by default if region has a duty cycle limit (#3277)

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

src/modules/AdminModule.cpp

@@ -332,6 +332,9 @@ void AdminModule::handleSetConfig(const meshtastic_Config &c)
         if (isRegionUnset && config.lora.region > meshtastic_Config_LoRaConfig_RegionCode_UNSET) {
             config.lora.tx_enabled = true;
             initRegion();
+            if (myRegion->dutyCycle < 100) {
+                config.lora.ignore_mqtt = true; // Ignore MQTT by default if region has a duty cycle limit
+            }
             if (strcmp(moduleConfig.mqtt.root, default_mqtt_root) == 0) {
                 sprintf(moduleConfig.mqtt.root, "%s/%s", default_mqtt_root, myRegion->name);
                 changes = SEGMENT_CONFIG | SEGMENT_MODULECONFIG;