interface, and deleted randomness argument.
(lsh_string_write_random): Likewise.

* src/keyexchange.h (class make_kexinit): Deleted randomness
argument from the make method.
(MAKE_KEXINIT): Deleted macro.

* src/keyexchange.c (do_make_simple_kexinit): Adapted to new
randomness interface, and deleted randomness argument.

* src/randomness.h: Deleted randomness class. New interface using
plain functions random_generate and random_add.

Rev: src/keyexchange.c:1.101
Rev: src/keyexchange.h:1.62
Rev: src/lsh_string.c:1.9
Rev: src/lsh_string.h:1.7
Rev: src/randomness.h:1.18