Describe the feature you'd like to add to nginx

Is that possible for Nginx to open source ssl key log related directives, such as ssl_key_log? Otherwise, I want to push my own version implementations since I don't want to patch Nginx all the time.

Describe the problem this feature solves

To facilitate debugging ssl handshake if there is any error.

Additional context

Actually, I have pushed a similar directive lua_ssl_key_log to OpenResty.