net: update comments of "struct msghdr" with the more accurate RFC3542 ones

Signed-off-by: NFrancois-Xavier Le Bail <fx.lebail@yahoo.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/socket.h

@@ -45,13 +45,13 @@ struct linger {
  */
  
 struct msghdr {
-	void	*	msg_name;	/* Socket name			*/
-	int		msg_namelen;	/* Length of name		*/
-	struct iovec *	msg_iov;	/* Data blocks			*/
-	__kernel_size_t	msg_iovlen;	/* Number of blocks		*/
-	void 	*	msg_control;	/* Per protocol magic (eg BSD file descriptor passing) */
-	__kernel_size_t	msg_controllen;	/* Length of cmsg list */
-	unsigned int	msg_flags;
+	void		*msg_name;	/* ptr to socket address structure */
+	int		msg_namelen;	/* size of socket address structure */
+	struct iovec	*msg_iov;	/* scatter/gather array */
+	__kernel_size_t	msg_iovlen;	/* # elements in msg_iov */
+	void		*msg_control;	/* ancillary data */
+	__kernel_size_t	msg_controllen;	/* ancillary data buffer length */
+	unsigned int	msg_flags;	/* flags on received message */
 };
 
 /* For recvmmsg/sendmmsg */