密码策略：
[switch] password-control enable //开启密码策略
[switch] password-control aging 7 //7天有效
[switch] password-control length 10 //长度为10
[switch] password-control composition type-number 3 type-length 1 //密码复杂度（3个字符）
[switch] password-control complexity user-name check //密码中不能包含用户名
[switch] password-control complexity same-character check //禁止连续3个同样的字符
[switch] password-control alert-before-expire 1 //提前1天提示修改密码
[switch] undo password-control history en //禁止记住历史密码
[switch] password-control login-attempt 5 ex lock-time 1 //密码输入错误5次后，锁定1分钟