ingore and threshold.
(select_write_size): New function, moved from ssh_write.c.
(update_status, write_data, write_flush): New functions, replacing
code in ssh_write.c.
(transport_write_packet, transport_write_line)
(transport_write_flush): Updated to changes in ssh_write_state.

Rev: src/transport_write.c:1.1.2.5