client: support per-client job files

Currently the fio network client sends all job files to all clients.
This isn't very flexible.

Add support for specifying a specific job file for each client. Example:

$ fio --client hostname1 jobfile1 --client hostname2 jobfile2

would before add jobfile1 and jobfile2 as job files for both clients.
With this change, only jobfile1 is sent to hostname1, and only
jobfile2 is sent to hostname2.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.h b/server.h
index 6d5a83d..9bf8907 100644
--- a/server.h
+++ b/server.h
@@ -124,6 +124,7 @@
 extern int fio_handle_clients(void);
 extern int fio_client_add(const char *, void **);
 extern void fio_client_add_cmd_option(void *, const char *);
+extern void fio_client_add_ini_file(void *, const char *);
 
 extern int fio_recv_data(int sk, void *p, unsigned int len);
 extern int fio_send_data(int sk, const void *p, unsigned int len);