Forward declaration of SVD_CleanupPlayback no longer needed (non-static,
declared in server.h). Server-side SV_SetConfigstring(CS_SVDEMO) is
redundant — G_InitGame sets it from the cvar which is now reliably
set before devmap.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>