minor changes: cleanup todo, correction help message, naming sniffer->mqtt_sniffer

mqtt_sniffer.py

 VERSION = "0.1.0"
 STARTTIME = time.time()
 # TODO: Implement default values for bottombar_entries
-# TODO: Implement the Filter functionality
 
 HELPTEXT = """
 F1: Get this help message
 F2: Set a filter (regular expression) for the topic of a message
     Examples:
-    * "/gfw/*/videv" Get everything with "/gfw/" before "/videv" 
-F9: Start / Stop logging to mqtt-sniffer.log
+    * "/gfw/.*/videv" Get everything with "/gfw/" before "/videv" 
+F9: Start / Stop logging to mqtt_sniffer.log
 F12: Quit the mqtt sniffer
 """
 
         data = message.payload
 
     if match:
-        print("%9.04f::%30s::%s" % (ts, message.topic, data))
+        print("%9.04f::%75s::%s" % (ts, message.topic, data))
         if my_bb.get_entry('log2file'):
-            logfile.write("%9.04f::%30s::%s\n" % (ts, message.topic, data))
+            logfile.write("%9.04f::%s::%s\n" % (ts, message.topic, data))
             logfile.flush()
 
 if __name__ == "__main__":
     my_bb.add_entry('msg_re', 2, my_bb.FUNC_TEXT, label='[F2] Filter')
     my_bb.add_entry('quit', 12, my_bb.FUNC_QUIT, "Quit", label='[F12]', right=True)
     my_bb.add_entry('log2file', 9, my_bb.FUNC_BOOL, label='[F9] Log2File', right=True)
-    with open('sniffer.log', 'w') as logfile:
-        mc = mqtt.mqtt_client("sniffer", args.hostname, port=args.port, username=args.username, password=password)
+    with open('mqtt_sniffer.log', 'w') as logfile:
+        mc = mqtt.mqtt_client("mqtt_sniffer", args.hostname, port=args.port, username=args.username, password=password)
         mc.add_callback("#", rx_mqtt)
         my_bb.run()