* src/symmetric/arcfour.c (arcfour_crypt): Changed argument order.

(arcfour_set_key): Likewise.
(arcfour_stream): New function.
(arcfour_update_key): New function.
(arcfour_init): New function.

Rev: src/symmetric/arcfour.c:1.5
Rev: src/symmetric/include/arcfour.h:1.2