update mqttd.conf, update hostname and ID

guowenxue

2019-07-31 8baf0e91fbb8a0ec580d4c00eac9c7bb3dd0de73

 apue/2.Socket/socket_client.c

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

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

       sleep(5);
    }