editors/nvi is a multi-byte extension of nvi-1.79; the rest are pretty
much skeletons (even more so than regular ports) that use most files
from editors/nvi and support for a particular encoding scheme.
These ports were submitted by the author of multilingual nvi patches.
Closes PR ports/2824.
Submitted by: Jun-ichiro Itoh <itojun@csl.sony.co.jp>