Clarify DENO_CERT behavior

[stil]

Can you please clarify the behavior of DENO_CERT env var?

https://github.com/denoland/docs/blob/8c523b8813d03a8b9b4e50d4193449b7ac75b368/runtime/reference/env_variables.md?plain=1#L68

I'm unsure what "loads" means here, does it append to the certs from DENO_TLS_CA_STORE or does it replace them? How does it interact with DENO_TLS_CA_STORE, can both options be used at the same time or are they mutually exclusive?

Is behavior of DENO_CERT same as NODE_EXTRA_CA_CERTS where DENO_CERT is only for loading "extra" certificates?

Thank you