RIFT DUEL LAUNCHER — protocol 4 compatible

Player: extract all files together, open RiftDuelLauncher.exe, choose Check & update, then Play. Windows x64 and .NET Framework 4.8 required. Keep launcher.json beside the executable.

Server owner: run tools/configure_public.py --hostname YOUR_DOMAIN before distributing. The included localhost configuration is for testing only. Public manifest URLs require HTTPS and gameServer must be a DNS hostname with a trusted TLS certificate. Default public game port is TCP 7777.

Previous version rolls back the client; the server must accept that version too. The launcher does not update itself.
