windows 7 安装sshd服务
cywin安装sshd一定提示输入密码，如下：
$ ssh-host-config
..
*** Info: Please enter a password for new user ssh_service. Please be sure
*** Info: that this password matches the password rules given on your system.
*** Info: Entering no password will exit the configuration.
*** Query: Please enter the password:
*** Query: Please enter the password:
*** Query: Please enter the password:
这里一直不成功，Ctrl-C退出,运行
/usr/sbin/sshd
就启动了 ssh 服务器了
