IPv6 should now work under Windows.

This is needed if a transport has two descriptors.
... which windows needs for dual stack IPv4/6. (next patch)

POSIX says return -1 on error. Windows returns whatever it feels like.
  => listen/accept/getaddrinfo all now compare for equality to 0
Windows also needs a call to WSAStartup before networking

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Added help and command-line options to eb-snoop---including little-endian option.

-hardcoded sdwb record for config space

-fixed major bug in stall handling from wb master interface

wb signal types for EB_CORE have been changed to to tomasz's wb records.

Beginning support for recursive SDWB.

  eb_device_close kills outstanding callbacks, not eb_socket_close.
... to do this, response tracked cycles remember their device.
... and on device close it filters the entire list of awaiting responses.

The reasoning behind this change:
  the user probably has handles to the device in the callback
  if he closes the device, the callbacks might run later with a bad pointer
  instead => kill those callbacks as part of closing the device.

These will work much nicer in hardware.