Set $session_compressor zlib;

Here at the company we have been using k4k8s installed via helm for some time now and we are facing the following problem.

I have this environment variable set
NGINX_PROXY_INCLUDE: '/mnt/proxy-include.conf'
the volume mounted via configmap with this configuration

  set $session_storage cookie;
  set $session_secret 'return os.getenv("KONG_CUSTOM_SESSION_SECRET")';
  set $session_cookie_domain;
  set $session_compressor zlib; ```

analyzing inside the container, the rendered template, this config is apparently not being used, should I put it somewhere else?

```/usr/local/share/lua/5.1/kong $ cat templates/nginx_kong.lua | grep session
  ssl_session_cache shared:SSL:10m;
  ssl_session_cache shared:AdminSSL:10m;
  ssl_session_cache shared:StatusSSL:1m;
  ssl_session_cache shared:ClusterSSL:10m;
/usr/local/share/lua/5.1/kong $ cat templates/kong_defaults.lua | grep session
ssl_session_tickets = on
ssl_session_timeout = 1d
nginx_http_ssl_session_tickets = NONE
nginx_http_ssl_session_timeout = NONE
nginx_stream_ssl_session_tickets = NONE
nginx_stream_ssl_session_timeout = NONE
/usr/local/share/lua/5.1/kong $ cat templates/nginx.lua | grep session
/usr/local/share/lua/5.1/kong $ ```