Diaspora: Configure Nginx for proxying http-bind to avoid mixed contant problems (XMPP)

gistfile1.nginxconf

upstream chat_cluster {
  server localhost:5280;
}
 
location /http-bind {
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header Host $http_host;
  proxy_set_header X-Forwarded-Proto https;
 
  proxy_redirect off;
  proxy_connect_timeout 5;
  proxy_buffering       off;
 
  proxy_read_timeout    70;
  keepalive_timeout     70;
  send_timeout          70;
 
  client_max_body_size 4M;
  client_body_buffer_size 128K;
 
  proxy_pass http://chat_cluster;
}