(transport_kexinit_handler): The KEYEXCHANGE_INIT method takes a
randomness generator as the second argument. Disconnect if the
method returns NULL.
(oop_read_ssh): More debug messages. Call reset_kexinit_state when
handling NEWKEYS.
(transport_keyexchange_finish): Set kex state to
KEX_STATE_NEWKEYS.

Rev: src/transport.c:1.6.2.5