Add variable update time for Ajax display. Update status.shtml with <pre> tag now used by cgi.

apps/webserver-nano/httpd.c

@@ -94,7 +94,6 @@ static
 PT_THREAD(send_file(struct httpd_state *s))
 {
   PSOCK_BEGIN(&s->sout);
-  
   do {
     PSOCK_GENERATOR_SEND(&s->sout, generate, s);
     s->file.len  -= s->len;
@@ -488,11 +487,18 @@ httpd_appcall(void *state)
     PT_INIT(&s->outputpt);
     s->state = STATE_WAITING;
     s->timer = 0;
+#if WEBSERVER_CONF_AJAX
+    s->ajax_timeout = WEBSERVER_CONF_TIMEOUT;
+#endif
     handle_connection(s);
   } else if(s != NULL) {
     if(uip_poll()) {
       ++s->timer;
-      if(s->timer >= 20) {
+#if WEBSERVER_CONF_AJAX
+      if(s->timer >= s->ajax_timeout) {
+#else
+      if(s->timer >= WEBSERVER_CONF_TIMEOUT) {
+#endif
         uip_abort();
         memb_free(&conns, s);
       }