Fixed a couple of critical possible failure cases

clang scan-build detected two issues that could lead to seg faults. These two issues have been fixed.

Initial release of mod_mosqutto

mod_mosquitto

Interface to an MQTT broker using Mosquitto
Implements a Publish/Subscribe (pub/sub) messaging pattern using the Mosquitto API library
Publishes FreeSWITCH events to one more more MQTT brokers
Subscribes to topics located on one more more MQTT brokers