Possibility to disable endpoint + README additions of missing previous items

[Vlczech]

[yedpodtrzitko]

Hi, thanks for the PR.

I can see what are you aiming for, but I dont think this should be handled via a new parameter in validate(). Without increasing its complexity, the same result can be achieved by returning 404 eagerly in given endpoint, no?

Is there similar feature in any of the existing frameworks/libraries? I modified Spectree for my project quite a lot so showing without context is a bit pointless, but it boils down to using if DEBUG: flask_app.add_url_rule('/my/dev/endpoint'). Similarly in Django adding endpoint for is usually solved as if settings.DEBUG: urlpatterns += my_dev_url_patterns`

But that just my 5 cents, I'll leave it up to @kemingy

[kemingy]

Appreciate your help to document deprecated.

As for the new feature of accessible, I cannot find this in the OpenAPI spec (correct me if I'm wrong).

Perhaps you can split them into two PR. We can discuss the accessible part.

[yedpodtrzitko]

There seems to be no progress, feel free to reopen this PR when ready.