Imported partly very pretty, partly very messy port of nvi.

Nasty situation is because of no ftruncate(), which causes awfulness
trying to emulate it. No writev() and fsync() system calls are less
serious, but the port will be cleaned up a great deal if and when those
system calls appear.

contrib/Makefile

@@ -1,3 +1,4 @@
 
 all install clean:
 	cd gnu && $(MAKE) $@
+	cd bsd && $(MAKE) $@

contrib/bsd/Makefile

@@ -0,0 +1,14 @@
+
+NVI=nvi-1.79
+NVIWORK=$(NVI)/minix
+
+all:
+	-mkdir $(NVIWORK)
+	cd $(NVIWORK) && CFLAGS="-D_MINIX=1 -D_POSIX_SOURCE=1" ../build/configure.minix --prefix=/usr/local --host=minix && make $@
+
+install: all
+	cd $(NVIWORK) && sh ../build/install.minix
+
+clean:
+	if [ -f $(NVIWORK)/Makefile ]; then cd $(NVIWORK) && make clean; fi
+