sftp_mkdir
if (sftp_mkdir(conn, target, &a, 1) != 0)
if (sftp_mkdir(conn, dst, &a, 0) != 0) {
if (sftp_mkdir(to, to_path, &curdir, 0) != 0) {
int sftp_mkdir(struct sftp_conn *, const char *, Attrib *, int);
err = sftp_mkdir(conn, path1, &a, 1);