server-clear.py: backlog changed and timeout added

the server has now a limit of 5 connections in socket.listen(). added a timeout from 3 seconds
to the connection

server-clear.py

@@ -50,7 +50,7 @@ def main():
         print('Socket created')
         try:
             mySocket.bind((HOST, PORT))
-            mySocket.listen()
+            mySocket.listen(5)
             print('Listen on {} at Port {}'.format(HOST, PORT))
         except Exception as e:
             print('Error: unable to bind and listen')
@@ -60,6 +60,7 @@ def main():
             try:
                 conn, addr = mySocket.accept()
                 print('Connection from {}:{}'.format(addr[0], addr[1]))
+                conn.settimeout(3.0)
                 connection_handle(conn)
             except KeyboardInterrupt:
                 print('\b\bExit')