windows/netinet: Copy ip6.h and icmp6.h from netbsd.

There are a few structure definitions that is used from
these headers. So copy them from the netbsd repo.

The following changes have been made on top of it:
* The keyword "__packed" has been removed
from the headers as the corresponding Linux headers don't
do packing.
* #if BYTE_ORDER == 'X' macros have been replaced by CONSTANT_HTONx().
* code inside #ifdef _KERNEL has been deleted.
* code inside #ifdef ICMP6_STRINGS has been deleted.

Signed-off-by: Gurucharan Shetty <[email protected]>
Acked-by: Ben Pfaff <[email protected]>

COPYING

@@ -26,6 +26,10 @@ The following files are licensed under the 2-clause BSD license.
     include/windows/getopt.h
     lib/getopt_long.c
 
+The following files are licensed under the 3-clause BSD-license
+    include/windows/netinet/icmp6.h
+    include/windows/netinet/ip6.h
+
 Files under the xenserver directory are licensed on a file-by-file
 basis.  Refer to each file for details.
 

debian/copyright.in

@@ -15,6 +15,8 @@ Upstream Copyright Holders:
 	Copyright (c) 2011 Gaetano Catalli
 	Copyright (C) 2000-2003 Geoffrey Wossum ([email protected])
 	Copyright (C) 2000 The NetBSD Foundation, Inc.
+	Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+	Copyright (c) 1982, 1986, 1993 The Regents of the University of California.
 
 License:
 
@@ -84,6 +86,11 @@ License:
 	lib/getopt_long.c
 	include/windows/getopt.h
 
+* The following files are licensed under the 3-clause BSD-license
+
+	include/windows/netinet/icmp6.h
+	include/windows/netinet/ip6.h
+
 * The following components are dual-licensed under the
   GNU General Public License version 2 and the Apache License Version 2.0.