directly on failure.
(sftp_put_reserve_length): New function, replacing sftp_put_reserve.
(sftp_put_length): New function.
(sftp_put_final_length): New function.
(sftp_put_printf): New function.
(sftp_put_strftime): New function.
(sftp_clear_attrib): Moved here from sftp-server.c.
(sftp_skip_extension): Likewise.
(sftp_get_attrib): Likewise.
(sftp_put_attrib): Likewise.

Rev: src/sftp/buffer.c:1.3
Rev: src/sftp/buffer.h:1.3