ip: ipv6: add tokenized interface identifier support

This patch adds support for tokenized IIDs, that enable
administrators to assign well-known host-part addresses
to nodes whilst still obtaining global network prefix
from Router Advertisements. This is the iproute2 part for
the kernel patch f53adae4eae5 (``net: ipv6: add tokenized
interface identifier support'').

Example commands with iproute2:

Setting a device token:
  # ip token set ::1a:2b:3c:4d/64 dev eth1

Getting a device token:
  # ip token get dev eth1
  token ::1a:2b:3c:4d dev eth1

Listing all tokens:
  # ip token list  (or: ip token)
  token :: dev eth0
  token ::1a:2b:3c:4d dev eth1

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
diff --git a/man/man8/Makefile b/man/man8/Makefile
index d208f3b..ff80c98 100644
--- a/man/man8/Makefile
+++ b/man/man8/Makefile
@@ -9,7 +9,7 @@
 	ip-addrlabel.8 ip-l2tp.8 \
 	ip-maddress.8 ip-monitor.8 ip-mroute.8 ip-neighbour.8 \
 	ip-netns.8 ip-ntable.8 ip-rule.8 ip-tunnel.8 ip-xfrm.8 \
-	ip-tcp_metrics.8 ip-netconf.8
+	ip-tcp_metrics.8 ip-netconf.8 ip-token.8
 
 all: $(TARGETS)