mqtt: clenaup logs and docs, esp_mqtt_abort_connection race condition
esp_mqtt_abort_connection: Fixed an issue which could result in a race condition and subsequent crash
esp_mqtt: Change an error print to use ESP_LOGE instead of ESP_LOGI
Move Sending MQTT connect message log from Info to Debug level
docs: Makes clear that publish API could block
Change the message printed after MQTT connection failure
David Cermak