Change to installing binaries with 'n' prefix as to not conflict with
editors/2bsd-vi. It does, however, now conflict with editors/nvi-m17n.
Remove dead MASTER_SITES.
Remove unnecessary RELENG_4 hack.
PR: ports/124547
Submitted by: Robert Wilson <hotaru@safe-mail.net>
Belatedly upgrade to 1.81.5. Notes: (a) patch-vi-relative has been
incorporated; (b) this now compiles on -current after libdb from databases/db3
was renamed to libdb3; (c) this now compiles on -stable (removed BROKEN since
-stable has wchar.h now); and (d) fixed plist.