wip/virus 0.0.6 NetBSD

VIrus (VI resembling utility skeleton) was originally taken from busybox and stripped of most unrelated stuff. The intention is to provide a pure, minimalist VI implementation that allows you to switch off shell-escaping and other security risks by default, and allow the admin to offer an interim user to just have a vi as login-shell on a certain host, while allowing others to work with a resource-sensitive and small vi implementation for your OS bootdisks.