'wdcli backup': Rework backup process

This commit reworks the backup process to dynamically find the list of
components.

internal/component/control/server.go

@@ -0,0 +1,39 @@
+package control
+
+import (
+	"net/http"
+
+	"github.com/tkw1536/goprogram/stream"
+)
+
+// Server returns an http.Mux that implements the main server instance
+func (control Control) Server(io stream.IOStream) (http.Handler, error) {
+	// self server
+	self, err := control.self(io)
+	if err != nil {
+		return nil, err
+	}
+
+	resolver, err := control.resolver(io)
+	if err != nil {
+		return nil, err
+	}
+
+	info, err := control.info(io)
+	if err != nil {
+		return nil, err
+	}
+
+	// resolver
+
+	mux := http.NewServeMux()
+	mux.Handle("/", self)
+
+	mux.Handle("/go/", resolver)
+	mux.Handle("/wisski/get/", resolver)
+
+	// TODO: Fix me!
+	mux.Handle("/dis/", info)
+
+	return mux, nil
+}