NetBSD adds a new text editor called atto

To ease the transition for new users, #NetBSD -current now includes an alternative editor to vi(1) and xedit(1) in its base system, atto(1). https://man.netbsd.org/atto.1 It is a modeless screen-based editor similar to nano, pico, xedit, or emacs. It is only 48 kilobytes, making it suitable for inclusion in the rescue system. (This is real, but I'm honestly missing an opportunity by not posting it on 1 April. Let the editor wars commence!)