Begin implementing a reporting mechanism

server/routes/metadata.js

@@ -4,9 +4,13 @@ module.exports = async function(req, res) {
   const id = req.params.id;
   const meta = req.meta;
   try {
+    if (meta.dead && !meta.flagged) {
+      return res.sendStatus(404);
+    }
     const ttl = await storage.ttl(id);
     res.send({
       metadata: meta.metadata,
+      flagged: !!meta.flagged,
       finalDownload: meta.dl + 1 === meta.dlimit,
       ttl
     });