drbd: --force option for disconnect

As the network connection can be lost at any time, a --force option
for disconnect is just a matter of completeness.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/include/linux/drbd_nl.h b/include/linux/drbd_nl.h
index 6fc614b0..ab6159e4 100644
--- a/include/linux/drbd_nl.h
+++ b/include/linux/drbd_nl.h
@@ -69,7 +69,9 @@
 	NL_BIT(		70,	T_MANDATORY,	dry_run)
 )
 
-NL_PACKET(disconnect, 6, )
+NL_PACKET(disconnect, 6,
+	NL_BIT(		84,	T_MAY_IGNORE,	force)
+)
 
 NL_PACKET(resize, 7,
 	NL_INT64(		29,	T_MAY_IGNORE,	resize_size)