Clean compile, basic DHCPv6 functionality is there.

TODO
     hostname handling.
     update DHCP6 configs from dns
     parse domain=<domain>,<IPv6 range>
     pretty-print counted string options.
     DECLINE messages
     lease-script fro DHCPv6
diff --git a/src/dhcp6_protocol.h b/src/dhcp6_protocol.h
index 590f7b5..7910920 100644
--- a/src/dhcp6_protocol.h
+++ b/src/dhcp6_protocol.h
@@ -53,7 +53,10 @@
 #define OPTION6_INTERFACE_ID    18
 #define OPTION6_RECONFIGURE_MSG 19
 #define OPTION6_RECONF_ACCEPT   20
-
+#define OPTION6_DNS_SERVER      23
+#define OPTION6_REMOTE_ID       37
+#define OPTION6_SUBSCRIBER_ID   38
+#define OPTION6_FQDN            39
 
 #define DHCP6SUCCESS     0
 #define DHCP6UNSPEC      1