source address lookup in kernel interface

use it for NAT detection if no source address known from config
  support for %any...%any connections

src/charon/sa/ike_sa.c

@@ -763,7 +763,7 @@ static status_t process_message(private_ike_sa_t *this, message_t *message)
 		}
 		
 		/* check if message is trustworthy, and update host information */
-		if (this->state == IKE_CREATED ||
+		if (this->state == IKE_CREATED || this->state == IKE_CONNECTING ||
 			message->get_exchange_type(message) != IKE_SA_INIT)
 		{
 			update_hosts(this, me, other);