
After mapver 5's incremental netmap updates & user profiles, much of the remaining bandwidth for streamed MapResponses were redundant, unchanged PacketFilters. So make MapRequest.Version 6 mean that nil means unchanged from the previous value.
After mapver 5's incremental netmap updates & user profiles, much of the remaining bandwidth for streamed MapResponses were redundant, unchanged PacketFilters. So make MapRequest.Version 6 mean that nil means unchanged from the previous value.