Add yy/mm to the log filename for better ordering

[MarcoRossignoli]

closes #3751

[nohwnd]

Would be nice to have the year as yyyy, to make it easier to see that the first entry is a year.

I would also love some separators, but in the issue you said you want to keep it short.

Personally I would drop the fff part, it is very unlikely that we will create the same date + pid within the same second. You dropped the PID, so ignore this comment.

[MarcoRossignoli]

Would be nice to have the year as yyyy, to make it easier to see that the first entry is a year.

I don't see 2 more char useful if not making the filename longer, the pattern is explained in the --help. I think that as first step is enough, after I agree that we could add a way to have composable name including placeholder for date, tfm, pid and other interesting information.
Also I would not advice to enabled always the logs, we don't have scenario where "real issue" are not crashing or failing "clearly" the execution(no try/catch/go on) and so without log is hard to understand what's happened.

We can followup on it in future if we will have other users request. This one looks ok, the order by name is wrong.