mysql-mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication

  mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file

这个问题的症结是安装用的权限过高所致。限制用的权限就可以了。

两个不同的用户权限：

bbs:这个用仅仅给了基本的权限

razar:这个用户给了所有的权限