HAProxy代理https(代理性能比nginx好, 但是不能代理静态文件)
合并nginx那种密钥(key + pem > pem)
cat frontend.chenhaifeng.top.key frontend.chenhaifeng.top.pem > /home/chf/HAProxy/certs/frontend.chenhaifeng.top.pem
cat backend.chenhaifeng.top.key backend.chenhaifeng.top.pem > /home/chf/HAProxy/certs/backend.chenhaifen