> can somwone explain me ... I guess one can, but it must be from old unix days. Things got changed and mixed, but they are considered ordinary now, so ordinary that even a basic newbie unix book skips them entirely. I am curious even now what is the link among shell, terminal, console, tty. Even the newbies list is closed.
All this will not hinder OpenBSD development, so use it as it is and try to grab some answers from internet, good or bad ones it is to you to check.