Tengine开启http2传输协议

1. http2的优势
2. 准备工作
   1. 需要重新编译openssl1.0.2以上版本
   2. 编译完成openssl后，需要重新使用openssl的库文件重新编译Tengine
3. 操作过程
   1. 安装openssl-1.0.2t
   cd /usr/local/src
   wget https://www.openssl.org/source/openssl-1.0.2t.tar.gz
   tar -zxvf openssl-1.0.2t.tar.gz
   cd openssl-1.0.2t
   ./config shared zlib
   make && make install
   mv /usr/bin/openssl /usr/bin/openssl.old
   mv /usr/include/openssl /usr/include/openssl.old
   ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
   ln -s /usr/local/ssl/include/openssl /usr/include/openssl
   echo "/usr/local/ssl/lib" >> /etc/ld.so.conf
   ldconfig -p
   openssl version
   2. 安装tengine
   ./configure --prefix=/usr/local/nginx --user=www --group=www --with-poll_module --with-pcre --with-http_realip_module --with-http_dav_module --with-http_gzip_static_module --with-http_degradation_module --with-http_addition_module --with-http_image_filter_module --with-http_sub_module --with-http_flv_module --with-http_slice_module --with-http_mp4_module --with-http_random_index_module --with-http_secure_link_module --add-module=/usr/local/nginx/modules/nginx-upsync-module --with-http_v2_module --with-http_secure_link_module --with-openssl=/usr/local/ssl
   make
   make install 如果是已经安装过tengine，不需要执行make install
   cp -af objs/nginx /usr/local/nginx/sbin/
   cp -af objs/dso_tool /usr/local/nginx/sbin/
   ./nginx -s stop
   ./nginx
   3. 配置nginx的server
   server {
   listen 443 ssl http2; 加入http2
   }
   4. 浏览器访问页面,f12,出现h2字样