Implement device ID server registration and server-side init

src/backend/initWIN.go

@@ -9,8 +9,8 @@ import (
 
 const FallbackEditor = "nvim" // since there is no pre-installed CLI editor on Windows, default to the most popular one
 
-// dirInit creates the libmutton directories
-func dirInit() {
+// DirInit creates the libmutton directories
+func DirInit() {
 	// create EntryRoot (includes config directory on Windows)
 	err := os.MkdirAll(EntryRoot, 0700)
 	if err != nil {