mod_dumpio: do nothing below log level TRACE7.

For instance, depending on EnableMMAP/Sendfile configuration, don't split
file brigades to 8K heap buckets upon reading.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1818802 13f79535-47bb-0310-9956-ffa450edef68

modules/debugging/mod_dumpio.c

@@ -181,6 +181,11 @@ static int dumpio_pre_conn(conn_rec *c, void *csd)
 {
     dumpio_conf_t *ptr;
 
+    if (APLOGctrace7(c)) {
+        /* Nothing to do below TRACE7 */
+        return OK;
+    }
+
     ptr = (dumpio_conf_t *) ap_get_module_config(c->base_server->module_config,
                                                  &dumpio_module);