message to a specific connection. `conn', however, may be NULL.
The `type' indicates the type of the message sent by the library.
The application can for example filter the message according the
- type. */
+ type. The variable argument list is arguments to the formatted
+ message that `msg' may be. */
void (*say)(SilcClient client, SilcClientConnection conn,
SilcClientMessageType type, char *msg, ...);