ceph: separate banner and connect during handshake into distinct stages

We need to make sure we only swab the address during the banner once.  So
break process_banner out of process_connect, and clean up the surrounding
code so that these are distinct phases of the handshake.

Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/messenger.h b/fs/ceph/messenger.h
index e016fa7..80f7e1e 100644
--- a/fs/ceph/messenger.h
+++ b/fs/ceph/messenger.h
@@ -104,8 +104,8 @@
  * thread is currently opening, reading or writing data to the socket.
  */
 #define LOSSYTX         0  /* we can close channel or drop messages on errors */
-#define LOSSYRX         1  /* peer may reset/drop messages */
-#define CONNECTING	2
+#define CONNECTING	1
+#define NEGOTIATING	2
 #define KEEPALIVE_PENDING      3
 #define WRITE_PENDING	4  /* we have data ready to send */
 #define QUEUED          5  /* there is work queued on this connection */