[XFRM]: Fix statistics.

o Outbound sequence number overflow error status
  is counted as XfrmOutStateSeqError.
o Additionaly, it changes inbound sequence number replay
  error name from XfrmInSeqOutOfWindow to XfrmInStateSeqError
  to apply name scheme above.
o Inbound IPv4 UDP encapsuling type mismatch error is wrongly
  mapped to XfrmInStateInvalid then this patch fiex the error
  to XfrmInStateMismatch.

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/Documentation/networking/xfrm_proc.txt b/Documentation/networking/xfrm_proc.txt
index 53c1a58..d0d8baf 100644
--- a/Documentation/networking/xfrm_proc.txt
+++ b/Documentation/networking/xfrm_proc.txt
@@ -26,8 +26,9 @@
 	e.g. SA key is wrong
 XfrmInStateModeError:
 	Transformation mode specific error
-XfrmInSeqOutOfWindow:
-	Sequence out of window
+XfrmInStateSeqError:
+	Sequence error
+	i.e. Sequence number is out of window
 XfrmInStateExpired:
 	State is expired
 XfrmInStateMismatch:
@@ -60,6 +61,9 @@
 	Transformation protocol specific error
 XfrmOutStateModeError:
 	Transformation mode specific error
+XfrmOutStateSeqError:
+	Sequence error
+	i.e. Sequence number overflow
 XfrmOutStateExpired:
 	State is expired
 XfrmOutPolBlock: