共享IP设置虚拟主机会共享请求吗？

Question

#    server {
#        listen       443 ssl http2;
#        server_name  www.test1.me test1.me;

#        ssl_certificate     1_www.test1.me_bundle.crt ;
#        ssl_certificate_key 2_www.test1.me.key ;
#
#        ssl_session_cache    shared:SSL:1m;
#        ssl_session_timeout  5m;
#        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    #    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
    
    http {
        include /usr/local/nginx/conf.d/http.conf;
        include /usr/local/nginx/conf.d/https.conf;
    }

1. https.conf 里面就是上面的配置

2. http.conf 去掉 listen 后面 http2 选项，而且目录在 shtml

3. shtml 目录的内容和 html 内容一样
   

疑惑
明明http.conf 里面没有配置 http2 这一项， 结果却使用了h2协议(难道共享了配置)