fio: make client operations pluggable

Signed-off-by: Stephen M. Cameron <stephenmcameron@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.h b/server.h
index 27da94f..f850773 100644
--- a/server.h
+++ b/server.h
@@ -123,7 +123,7 @@
 
 extern int fio_clients_connect(void);
 extern int fio_clients_send_ini(const char *);
-extern int fio_handle_clients(void);
+extern int fio_handle_clients(struct client_ops *ops);
 extern int fio_client_add(const char *, void **);
 extern void fio_client_add_cmd_option(void *, const char *);