使用 squid 做代理调度， https 不走代理应该如何配置？

squid 配置

via off
forwarded_for off

request_header_access From deny all
request_header_access Server deny all
request_header_access WWW-Authenticate deny all
request_header_access Link deny all
request_header_access Cache-Control deny all
request_header_access Proxy-Connection deny all
request_header_access X-Cache deny all
request_header_access X-Cache-Lookup deny all
request_header_access Via deny all
request_header_access X-Forwarded-For deny all
request_header_access Pragma deny all
request_header_access Keep-Alive deny all

cache_dir null /tmp

http_access allow all

http_port 3128 


include /etc/squid/peers.conf

访问 http://httpbin.org/get，可以看到每次刷新都是不同 ip，但 https://httpbin.org/get 还是原始 ip，没有走代理，求教应该如何配置才能使 https 也走代理？