Proposal 340 clarifications
Notably:
- end-of-message marker is omitted when message data ends at exactly a relay cell boundary.
- packing is more for hiding control messages from network observers than for network efficiency.
- Specify the new subprotocol RelayCell.
- Explicitly state that cells with unrecognized relay commands should result in immediate circuit closure, even if the rest of the message hasn't arrived yet due to fragmentation.
- Add note that initial packing algorithm needs to be updated.