Update Python client (fix bugs)

net/UnicastConnection.py

@@ -107,5 +107,11 @@ class UnicastConnection:
 
     def close(self):
         self.sock.close()
+        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.is_connected = False
+        self.is_tls = False
+        self.ssock = None
+        self.ca_path = None
+        self.ssl_info = None