Fixed IPV6 regex https://git.ispconfig.org/ispconfig/ispconfig3/issues/4002

Pascal Dreissen

2016-07-05 fbfdc438eaf2a70d5fefda74c919edc76e82d0fd

 server/plugins-available/software_update_plugin.inc.php

@@ -267,7 +267,6 @@
            $app->log('Unable to create database user'.$db_config['database_user'].' '.mysqli_error($link), LOGLEVEL_ERROR);
         }

         mysqli_query($link, "FLUSH PRIVILEGES;");
         mysqli_close($link);

      }