The PostgreSQL server will reject messages greater than ~1 GB anyway.
However, worse than that is that a message that is larger than 4 GB
could wrap the 32-bit integer message size and be interpreted by the
server as multiple messages. This could allow a malicious client to
inject arbitrary protocol messages.
https://github.com/jackc/pgx/security/advisories/GHSA-mrww-27vc-gghv
Fix infinite loop in AuthenticationSASL.Decode
Fix panic in CommandComplete.Decode
Fix panic in DataRow.Decode
Fix panic in NotificationResponse.Decode
Use an internal buffer in pgproto3.Frontend and pgproto3.Backend instead
of directly writing to the underlying net.Conn. This will allow tracing
messages as well as simplify pipeline mode.
