Add support for --add-spare

--add-spare is like --add, but a --re-add is never attempted.
So it is equivalent to two separate commands:

 --zero-metadata
 --add

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/mdadm.h b/mdadm.h
index cb207c9b..7cfdd8fd 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -311,6 +311,7 @@ enum special_options {
 	Brief,
 	ManageOpt,
 	Add,
+	AddSpare,
 	Remove,
 	Fail,
 	Replace,