update mqtt configure file, support breakin detect support

guowenxue

2019-07-31 4deb51ffc4dd4588183aed82bd7877909ba2130e

 apue/2.Socket/socket_client.c

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

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

       sleep(5);
    }