Raknetify2

Fixes encrypted-login stalls in the native Forge 1.20.1 and NeoForge 1.21.1 clients. The client now enables frame encryption after encoding its key response, without waiting for a remote RakNet acknowledgement. This prevents an encrypted server response from arriving before the client is ready to read it.

Also preserves encoding failures when completing login compression transitions. The transport wire format is unchanged; the corrected client can join an existing 0.1.0-beta.1.485 server.

Release checks now exercise native encrypted login, mod payloads, dimensions and chat over TCP, both RakNet MTU settings and UDP DNS discovery, including delayed server acknowledgements.