Event Point pre_system and post_system are different from the docs

[kenjis]

Are these bugs or not?

https://codeigniter4.github.io/CodeIgniter4/extending/events.html#event-points

• pre_system Called very early during system execution. Only the benchmark and events class have been loaded at this point. No routing or other processes have happened.
• post_system Called after the final rendered page is sent to the browser, at the end of system execution after the finalized data is sent to the browser.

[kenjis]

Is the CI4 documentation just out of date?
http://codeigniter.com/userguide3/general/hooks.html#hook-points

Why are pre_controller, post_controller, display_override, and cache_override missing in CI4?

[MGatner]

I think just inaccurate descriptions. I wouldn't change the current behavior.

[kenjis]

Okay, I will fix as a bug in the docs.

[kenjis]

I sent a PR #8055.