Check disable_functions before set_time_limit

src/Http/Response.php

@@ -2708,7 +2708,9 @@ class Response implements ResponseInterface
         }
 
         $bufferSize = 8192;
-        set_time_limit(0);
+        if (array_search('set_time_limit', explode(',', ini_get('disable_functions'))) === false) {
+            set_time_limit(0);
+        }
         session_write_close();
         while (!feof($file->handle)) {
             if (!$this->_isActive()) {