DOC: fix typo in comments

Hi Willy,

There is a patch to fix typo in comments, please check the attachment
for you information.

The commit log is as below:

commit 9824d1b3740ac2746894f1aa611c795366c84210
Author: Godbach <nylzhaowei@gmail.com>
Date:   Mon Sep 30 11:05:42 2013 +0800

    DOC: fix typo in comments

      0x20000000 -> 0x40000000
      vuf -> buf
      ethod -> Method

    Signed-off-by: Godbach <nylzhaowei@gmail.com>

--
Best Regards,
Godbach

From 9824d1b3740ac2746894f1aa611c795366c84210 Mon Sep 17 00:00:00 2001
From: Godbach <nylzhaowei@gmail.com>
Date: Mon, 30 Sep 2013 11:05:42 +0800
Subject: [PATCH] DOC: fix typo in comments

  0x20000000 -> 0x40000000
  vuf -> buf
  ethod -> Method

Signed-off-by: Godbach <nylzhaowei@gmail.com>
diff --git a/include/types/channel.h b/include/types/channel.h
index ee5f1b8..42160af 100644
--- a/include/types/channel.h
+++ b/include/types/channel.h
@@ -118,7 +118,7 @@
 #define CF_NEVER_WAIT     0x08000000  /* never wait for sending data (permanent) */
 
 #define CF_WAKE_ONCE      0x10000000  /* pretend there is activity on this channel (one-shoot) */
-/* unused: 0x20000000, 0x20000000, 0x80000000 */
+/* unused: 0x20000000, 0x40000000, 0x80000000 */
 
 /* Use these masks to clear the flags before going back to lower layers */
 #define CF_CLEAR_READ     (~(CF_READ_NULL|CF_READ_PARTIAL|CF_READ_ERROR|CF_READ_ATTACHED))
@@ -266,7 +266,7 @@
    eventually leave the buffer. So as long as ->to_forward is larger than
    global.maxrewrite, we can fill the buffer. If ->to_forward is smaller than
    global.maxrewrite, then we don't want to fill the buffer with more than
-   vuf->size - global.maxrewrite + ->to_forward.
+   buf->size - global.maxrewrite + ->to_forward.
 
    A buffer may contain up to 5 areas :
      - the data waiting to be sent. These data are located between buf->p-o and
diff --git a/include/types/proto_http.h b/include/types/proto_http.h
index 1d7c92f..d0fa766 100644
--- a/include/types/proto_http.h
+++ b/include/types/proto_http.h
@@ -121,7 +121,7 @@
 
 /* these ones define a request start line */
 #define HTTP_MSG_RQMETH        2 // parsing the Method
-#define HTTP_MSG_RQMETH_SP     3 // space(s) after the ethod
+#define HTTP_MSG_RQMETH_SP     3 // space(s) after the Method
 #define HTTP_MSG_RQURI         4 // parsing the Request URI
 #define HTTP_MSG_RQURI_SP      5 // space(s) after the Request URI
 #define HTTP_MSG_RQVER         6 // parsing the Request Version