FTBBS V5.6 090620修改功能说明： 1、优化了数据库索引功能以及数据查询功能使得更加的快速稳定. 2、所有文件上传等加大了安全防范措施修正了旧版中的一些细节问题,取回密码功能也进行了改进.-FTBBS V5.6 090620 modify the function descr iption: 1, optimized the　indexing function and data query function makes more fast and stable. 2, all file uploads increased security precautions to amend the old version of some of the details of the problem, retrieve the password Function has also been improved.