• Add LIST_CAP_MDEV & LIST_CAP_MDEV_TYPES constants
  
• Fix send_all() callback helper
  
• Introduce flags to Stream::recv() and
  register RECV_STOP_AT_HOLE constant
  
• Introduce Stream::recv_hole() and Stream::send_hole()
  
• Introduce Stream::sparse_recv_all()
  
• Introduce Stream::sparse_send_all()
  
• Register VOL_DOWNLOAD_SPARSE_STREAM &
  VOL_UPLOAD_SPARSE_STREAM constants
  
• Add vol-sparse.pl example
  
• Add new domain event constants
  
• Add new LIST_CAP_CCW_DEV constant