(initiate_keyexchange): Deleted mode argument, use
connection->flags instead.
(do_handle_kexinit): Use connection->flags.
(make_kexinit_handler): Deleted type argument.
(install_keys, install_new_keys): Deleted classes.
(install_keys): Made the INSTALL_KEYS method an ordinary function.
(keyexchange_finish): Use install_keys().

Rev: src/keyexchange.c:1.66
Rev: src/keyexchange.h:1.45