Client can now connect to servers interactively

luprex/cpp/core/lpxserver.cpp

@@ -41,6 +41,8 @@ public:
         // Create an actor for administrative commands.
         admin_id_ = master_->create_login_actor();
 
+        // TODO: initialize the admin actor.
+
         // Print out admin ID for debugging purposes.
         stdostream() << "Admin actor id = " << admin_id_ << std::endl;
 
@@ -196,8 +198,11 @@ public:
             if (chan->port() == 8085) {
                 Client *client = new Client;
                 client->actor_id_ = master_->create_login_actor();
+                // TODO: initialize the login actor on the master.
                 client->channel_ = std::move(chan);
                 client->sync_.reset(new World(WORLD_TYPE_PREDICTIVE));
+                // This login actor is never used, it is just to preserve the invariant that
+                // the client model and the server synchronous model are identical.
                 client->sync_->create_login_actor();
                 clients_.emplace_back(client);
                 stdostream() << "New client: actor id=" << client->actor_id_ << std::endl;