sun.com documentation fixes

After I came across a help text for SUNGEM mentioning a broken sun.com
URL, I felt like fixing those up, as they are now pointing to oracle.com
URLs.

Signed-off-by: Christian Kujau <lists@nerdbynature.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index 4f7fe72..a2246af 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -11,7 +11,7 @@
 	  You will still be able to do traditional IPv4 networking as well.
 
 	  For general information about IPv6, see
-	  <http://playground.sun.com/pub/ipng/html/ipng-main.html>.
+	  <https://en.wikipedia.org/wiki/IPv6>.
 	  For Linux IPv6 development information, see <http://www.linux-ipv6.org>.
 	  For specific information about IPv6 under Linux, read the HOWTO at
 	  <http://www.bieringer.de/linux/IPv6/>.