Added STANDBY state

src/kernel/messenger.h

@@ -66,6 +66,7 @@ struct ceph_msg_pos {
 #define REJECTING        7
 #define CLOSING          8
 #define CLOSED           9
+#define STANDBY          10 /* standby, when socket gets TCP_CLOSE and no message queued */
 
 struct ceph_connection {
 	struct ceph_messenger *msgr;