Add a SMF manifest for wip/spread4.
Update spread4 to 4.4.0.

Features:
- New accelerated ring protocol tailored for data center networks.
  This protocol provides 30%-50% higher throughput and 20-35% lower latency
  in modern local area networks. Both the original protocol and the accelerated
  ring protocol are available in this version.
- More efficient packet packing.
- Windows project files now build again.
- New spread-service project to make Spread into a proper Windows service.
       - Needs testing from the community!
- Additional and improved MEMBERSHIP and PROTOCOL logging.

Improvements:
- Remove named pipe for accepting UNIX socket connections on exit
- Allow token sizes up to 64KB (uses IP fragmentation may exacerbate loss
  -- will log a warning) rather than hard failure if > 1.5KB
- Send bcast retransmissions immediately rather than queue to suppress
  unnecessary re-requests in accelerated protocol

Bug fixes:
- EVS bugs:
  - Set Aru to 0 when we transition to EVS.
  - Ignore Token->seq when in EVS.
  - Fixed Backoff_membership referring to wrong packet when ring breaks in EVS.
  - Fixed token retransmissions while transitioning from EVS to OP.
- Token bugs:
  - Token->aru calculaton fixed; Set_aru eliminated.
  - Ignore tokens from wrong membership + sender.
- Alarm on Windows:
  - Alarm(EXIT) now exits with non-zero code instead of aborting.
  - Fixed long log lines crash bug.
- Allow ports >= 2^15 to be used.
- Turned off Nagle algorithm in Java library.