It is unclear from the documentation how to proceed with SSH_SCP_REQUEST_NEWFILE when ssh_scp_request_get_size() returns 0, i.e downloading an empty file.
>From trial and error I found that the client has to call ssh_scp_accept_request() and ssh_scp_read() at least once, even though there is no data to copy. If we don't do this, we get an error "called under invalid state" upon the next ssh_scp_pull_request(). Is this expected?
