upstream check module supported midify on the fly

src/http/ngx_http_upstream.h

@@ -1,4 +1,3 @@
-
 /*
  * Copyright (C) Igor Sysoev
  * Copyright (C) Nginx, Inc.
@@ -434,6 +433,11 @@ ngx_uint_t ngx_http_upstream_check_peer_down(ngx_uint_t index);
 void ngx_http_upstream_check_get_peer(ngx_uint_t index);
 void ngx_http_upstream_check_free_peer(ngx_uint_t index);
 
+ngx_uint_t ngx_http_upstream_check_add_dynamic_peer(ngx_pool_t *pool,
+    ngx_http_upstream_srv_conf_t *us, ngx_addr_t *peer);
+void ngx_http_upstream_check_delete_dynamic_peer(ngx_str_t *name,
+     ngx_addr_t *peer_addr);
+
 #endif
 
 extern ngx_module_t        ngx_http_upstream_module;