implement more plumbing between client and server network

src/Launcher.h

@@ -3,6 +3,7 @@
 #include "Config.h"
 #include "Identity.h"
 #include "Sync.h"
+#include "Version.h"
 #include <boost/asio/ip/tcp.hpp>
 #include <boost/asio/ip/udp.hpp>
 #include <boost/thread/scoped_thread.hpp>
@@ -11,6 +12,9 @@
 #include <string>
 #include <thread>
 
+class ClientNetwork;
+class ServerNetwork;
+
 class Launcher {
 public:
     Launcher();
@@ -31,6 +35,14 @@ public:
 
     Sync<ident::Identity> identity {};
 
+    Result<void, std::string> start_server_network(const std::string& host, uint16_t port);
+
+    Sync<Version> mod_version {};
+    Sync<Version> game_version {};
+
+    std::unique_ptr<ClientNetwork> client_network {};
+    std::unique_ptr<ServerNetwork> server_network {};
+
 private:
     /// Thread main function for the http(s) proxy thread.
     void proxy_main();