synchronized with lua-nginx-module #2fb8f12.

feature: added support for the Nginx builtin Link header.

This allows for specifying multiple values in the Link header.

Thanks bjoe2k4 and tokers for the upstream patch.

Author: thibaultcha

src/http/ngx_http_lua_headers_out.c

@@ -106,6 +106,12 @@ static ngx_http_lua_set_header_t  ngx_http_lua_set_handlers[] = {
                  offsetof(ngx_http_headers_out_t, cache_control),
                  ngx_http_set_builtin_multi_header },
 
+#if defined(nginx_version) && nginx_version >= 1013009
+    { ngx_string("Link"),
+                 offsetof(ngx_http_headers_out_t, link),
+                 ngx_http_set_builtin_multi_header },
+#endif
+
     { ngx_null_string, 0, ngx_http_set_header }
 };