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添加hmain signal_handle_noexit函数
因为signal_handle内部自动exit结束程序,而当业务层需要在exit之前做一些操作(例如执行打开正在运行的http服务首页url),因此需要支持一个不自动exit的函数版本。
支持自定义设置hmain内部msg信息 printf函数指针
因为不是所有程序都是控制台程序,而非控制台程序需要采用MessageBox或其他信息渲染方式来提示信息,因此需要支持自定义设置hmain使用的printf函数指针接管后由用户业务层采用其他形式进行提示。