ULID cookie

[g105b]

It's useful to track requests against their sessions, to track down issues or monitor real world usage. This is where something like Google Analytics is usually used, but that requires cross-domain cookies, which is extremely bad for user privacy, so requires annoying cookie popups by law.

All of the required analytical functionality can be achieved by setting a ULID cookie. Even though there's no cross domain cookies involved, this should still be opt-in by the developer.

In config.default.ini, set app.unique_cookie= to disable by default, but if any value is set here it will be used as the cookie name. Setting app.unique_cookie=ulid.

This will allow logs to be made with the appropriate ULID, and nginx can store this ULID in the access log for general usage analytics.