修正is_storage_ok注释错误，以及增强is_mysql_ok验证
修正is_storage_ok注释错误，以及增强is_mysql_ok验证

liukaijv/DiliCMS,qiuai/DiliCMS,chekun/DiliCMS,qiuai/DiliCMS,liukaijv/DiliCMS,apple-tom/DiliCMS,apple-tom/DiliCMS,liukaijv/DiliCMS,qiuai/DiliCMS,chekun/DiliCMS,apple-tom/DiliCMS