Replace vague "Alpelo object system backport" references in CHANGELOG
and AUTHORS with accurate descriptions of the per-session object ID
allocation rework. Remove stale test comment referencing the deleted
NextObjectID method.
When a quest or scenario file was missing, handleMsgSysGetFile sent nil
data via doAckBufSucceed, which crashed the game client. Now sends
doAckBufFail so the client can handle the missing file gracefully.
Closes#109
Wrap *rand.Rand in a mutex-protected SafeRand type to make the global
RNG safe for concurrent use across goroutines. The previous bare
*rand.Rand caused data races detected by go test -race.
UTF8ToSJIS panicked when encountering characters outside the Shift-JIS
range (emoji, Lenny faces, cuneiform, etc.), crashing the server when
such characters were sent via the Discord relay channel.
Replace the panic with graceful filtering that drops unmappable runes
and preserves valid content. Also fix ToNGWord index-out-of-range panic
on empty encoder output.
Closes#116
