获取站点的各类响应时间(dns解析时间,响应时间,传输时间)

ssl_verify_result ssl认证结果，返回0表示认证成功。( The result of the SSL peer certificate verification that was requested. 0 means the verification was successful. (Added in 7.19.0))

若多次使用-w参数，按最后一个的格式输出。If this option is used several times, the last one will be used.