引用 https://darkdark.top/update-curl.html
centos6 rpm 升级包下载:https://download.csdn.net/download/sinat_24092079/88425840
yum update libcurl-8.4.0-1.el6.1.x86_64.rpm curl-8.4.0-1.el6.1.x86_64.rpm
centos7 rpm 升级包下载:https://download.csdn.net/download/sinat_24092079/88425840
yum update libcurl-8.4.0-1.el7.1.x86_64.rpm curl-8.4.0-1.el7.1.x86_64.rpm