Allow for OS and SUBOS folders so we can introduce NetBSD scripts whilst keeping BSD for all BSD's.

mk/depend.mk

@@ -0,0 +1,11 @@
+# This only works for make implementations that always include a .depend if
+# it exists. Only GNU make does not do this.
+
+# Copyright 2008 Roy Marples <roy@marples.name>
+
+CLEANFILES+=	.depend
+
+.depend: ${SRCS}
+	${CC} ${CFLAGS} -MM ${SRCS} > .depend
+
+depend: .depend