支持大文件的读写
添加配置文件处理类
使用新的配置类来读取配置，而不是从命令行参数中读取
使用CMake来构建
fix crash after tcp_listen() failed
remove -O2 option
ssl_err_exit() should exit with EXIT_FAILURE
remove comma at the end of enum
添加ffbuffer::find()和ffbuffer::at()
添加server_config::reset()和server_config::read_config()
添加test_find()测试用例
read config file from ./test/server.conf
added class ser_request_whole
correct the order of #include
added split_path() and unit test
fix possible security hole
add task_scheduler
add pthread in CMakeLists.txt