bbvi (vi stripped from busybox)

In 2003, Stefan Koerner stripped vi from busybox-0.52 and called it virus - vi resembling utility skeleton.
But it is unmaintained since then, so I do that again and called it "bbvi".
Hopefully I will do it every busybox minor number changes, and sync bbvi version to busybox version.

Source: bbvi-0.1.23.tar.gz