transport_write_flush.
(transport_send_packet): Updated calls to transport_write_packet
and transport_write_flush.
(transport_send_kexinit): Updated to new make_kexinit interface.

* src/transport_write.c (make_ignore_packet): Deleted randomness
argument.
(transport_write_packet): Likewise.
(transport_write_flush): Likewise.

* src/transport_read.c (decode_packet): Use random_add, to mix the
received random padding into the pool.

* src/transport.h (class transport_context): Deleted randomness
attribute.

Rev: src/transport.c:1.12
Rev: src/transport.h:1.10
Rev: src/transport_read.c:1.8
Rev: src/transport_write.c:1.3