server: include number of CPUs in probe reply

We'll need this for affinity mask setting. Also add room
for flags, we'll want to pass back a flag mask of supported
features on the remote end.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.h b/server.h
index d56d498..3c70421 100644
--- a/server.h
+++ b/server.h
@@ -38,7 +38,7 @@
 };
 
 enum {
-	FIO_SERVER_VER			= 14,
+	FIO_SERVER_VER			= 15,
 
 	FIO_SERVER_MAX_FRAGMENT_PDU	= 1024,
 
@@ -92,6 +92,8 @@
 	uint8_t os;
 	uint8_t arch;
 	uint8_t bpp;
+	uint32_t cpus;
+	uint64_t flags;
 };
 
 struct cmd_single_line_pdu {