邮件服务器新增注册验证问答机制20140315

2014.3.15

*add new registeration verification.

新增Webmail注册时的验证问答机制.

2014.03.13

*add user-defined SMTP/POP3 response string.

增加自定义SMTP和POP3回应串: mailserver.ini [Setup] ServerResponse=...

*improve detection for database connection.

增加对于数据库连接的检测.