I will have to get back to you on that. I going on a job trip in a few hours for 2½ week. Maybe it has been fixed by then

1)
I have server setup with config files using a custom port for the Factorio Server. I only copy that config between server versions and it works great. Except on v16.16, it doesn't matter what I set the "port" to, it always binds to the default port 34197.

2)
If I try to connect to v0.16.16 with ...

Seeing how that wiki article was last updated two years ago, I doubt that it is better documentation.

Your questions are quite puzzling to me. There are no standardized classes in lua and standard event handlers are passing a simple table with fields described in the api docs. Without whatever ...

Yes I know Lua syntax quite well (I have written a Lua Editor/Debugger in C++) and 'object' is a table with a member 'meta' according to the code I found in a mod.
The member 'meta' seems to be a table with another member named 'entity'. I did find the 'entity' class documentation and it has a ...

Duh, ok thank you I see now...
But what class type is the parameter object?

According to the Wiki there should only be object.name and object.tick so what is object.meta? Is it just a short for Lua's getmetatable(object) ?

I must be either sever stupid or I haven't been clear enough.
I'm not talking about HOW to register an event, I'm talking about the callback to the registered event.

classes["item-name"] = {
on_tick = function(object)
local control = object.meta.entity.get_control_behavior()

I have been at ...

I just started to look at modding and in the Wiki I can only find information on how to register an event. But there is no information on the actual callback of the event.
I had a look at another mod, in control.lua, to see how it work and this is how the callback is called:

on_tick = function ...