dir2config: switch to includes instead of ad-hoc defaults

modd.conf

@@ -17,6 +17,10 @@ dist/dkl-local-server {
   daemon +sigterm: dist/dkl-local-server -data tmp -auto-unlock test
 }
 
+dist/dkl-dir2config {
+  prep: dist/dkl-dir2config --debug --in test-dir2config
+}
+
 **/*.proto !dist/**/* {
   prep: for mod in @mods; do protoc -I ./ --go_out=plugins=grpc,paths=source_relative:. $mod; done
 }