http: add info message about memcap

Display a message about http memcap when it is set in config file.

src/app-layer-htp-mem.c

@@ -56,6 +56,7 @@ void HTPParseMemcap()
                        conf_val);
             exit(EXIT_FAILURE);
         }
+        SCLogInfo("HTTP memcap: %"PRIu64, htp_config_memcap);
     } else {
         /* default to unlimited */
         htp_config_memcap = 0;