2005-12-03 Richard D. Worth <richard@theworths.org>

        * PROTOCOL: Add underscores to error codes. Add STATISTICS
        command. Remove statistics from WHO.

        * TODO: Add STATISTICS. Check off STATISTICS.

        * src/ttt.h: Define TTT_SERVER_PROTOCOL_VERSION for VERSION.

        * src/ttt-error.c: (ttt_error_string): Add underscores to error
        codes.

        * src/ttt-client.h:
        * src/ttt-client.c: (_ttt_client_execute_helo),
        (_ttt_client_execute_statistics), (_ttt_client_execute_message),
        (_ttt_client_execute_version), (_ttt_client_execute_quit),
        (_ttt_client_init), (_ttt_client_fini), (ttt_client_get_username),
        (ttt_client_set_username): Rename client->name to
        client->username. Implement STATISTICS. Complete implementation of
        VERSION.

        * src/ttt-server.h:
        * src/ttt-server.c: (ttt_server_register_client),
        (ttt_server_unregister_client), (ttt_server_who),
        (ttt_server_statistics): Track rename of client->name to
        client->username. Add server helper for STATISTICS.