void silc_client_command_send(SilcClient client,
                                  SilcClientConnection conn,
                                  SilcCommand command, SilcUInt16 ident,
                                  SilcUInt32 argc, ...);

    Generic function to send any command. The arguments must be sent already
    encoded into correct form and in correct order. If application wants
    to perform the commands by itself, it can do so and send the data
    directly to the server using this function.  If application is using
    the silc_client_command_call, this function is usually not used.
    Note that this overriders the Client Librarys commands and sends
    the command packet directly to server.

    Programmer should get familiar with the SILC protocol commands
    specification when using this function, as the arguments needs to
    be encoded as specified in the protocol.

    The variable arguments are a pair of { type, data, data_length },
    and the `argc' is the number of these pairs.

    silc_client_command_send(client, conn, SILC_COMMAND_WHOIS, 0, 1,
                             1, nickname, strlen(nickname));