fix request counter for X-Accel-Redirect, the bug was introduced in r3050

src/http/ngx_http_upstream.c

@@ -1815,6 +1815,7 @@ ngx_http_upstream_process_headers(ngx_http_request_t *r, ngx_http_upstream_t *u)
         r->valid_unparsed_uri = 0;
 
         ngx_http_internal_redirect(r, uri, &args);
+        ngx_http_finalize_request(r, NGX_DONE);
         return NGX_DONE;
     }