skip noblogs.org blog when creating the map

wp-nginx-map.php

@@ -42,6 +42,8 @@ function generate_map() {
   printline(' default http://' . NOBLOGS_MASTER . ':82;');
   foreach ($blogs as $blog) {
     $blog_id = $blog->blog_id;
+    if ($blog_id == 1)
+      continue;
     $backend_id = $wpdb_hash->lookup($blog_id);
     $backend_http = backend_to_http_endpoint($backend_id);
     printline(' ' . $blog->domain . ' http://' . $backend_http . ';');