update iotd and test infared ok

guowenxue

2021-04-23 7a0488541f68d1a9eb712a4eb5c6c36da150bc4a

 apue/2.Socket/socket_client.c

@@ -109,7 +109,8 @@
          }
       }

       //printf("Read %d bytes data from server: '%s'\n", rv, buf);

       sleep(5);
    }