initial support for IPv6 (more testing needed)

socket works (without v6 filter)
  traffic selector handle IPv4/v4 cleanly
    improvements in traffic selector code
  kernel interface accepts v6 traffic selectors and hosts
  host_t class has full IPv6 support

src/charon/queues/send_queue.c

@@ -111,7 +111,7 @@ static void add(private_send_queue_t *this, packet_t *packet)
 	
 	src = packet->get_source(packet);
 	dst = packet->get_destination(packet);
-	this->logger->log(this->logger, CONTROL, "sending packet: from %s:%d to %s:%d",
+	this->logger->log(this->logger, CONTROL, "sending packet: from %s[%d] to %s[%d]",
 					  src->get_string(src), src->get_port(src),
 					  dst->get_string(dst), dst->get_port(dst));