Add Bluetooth classic as a sensor network #69, #195, #90

I think the architecture of the ble sensor network, which does not use
threads per socket, can be applied to DTLS.

Known bug:
Occasionally a timeout error occurs when connecting to RFCOMM.
BLE is not supported yet. I need help to do it.


Signed-off-by: tomoaki <tomoaki@tomy-tech.com>

MQTTSNGateway/gateway.conf

@@ -27,6 +27,7 @@ ClientAuthentication=NO
 AggregatingGateway=NO
 QoS-1=NO
 Forwarder=NO
+MaxNumberOfClients=30;
 
 #ClientsList=/path/to/your_clients.conf
 
@@ -68,6 +69,9 @@ BaudrateLoRaLink=115200
 DeviceRxLoRaLink=/dev/loralinkRx
 DeviceTxLoRaLink=/dev/loralinkTx
 
+# BLE RFCOMM
+BleAddress=60:57:18:06:8B:72.*
+
 # LOG
 ShearedMemory=NO;