Revert "Mark tests of tunnel/AH/IPv6 as expected failure (PR kern/52161)"

The issue was fixed by christos@

tests/net/ipsec/t_ipsec_tunnel.sh

@@ -1,4 +1,4 @@
-#	$NetBSD: t_ipsec_tunnel.sh,v 1.2 2017/04/14 03:35:40 ozaki-r Exp $
+#	$NetBSD: t_ipsec_tunnel.sh,v 1.3 2017/04/16 10:34:49 ozaki-r Exp $
 #
 # Copyright (c) 2017 Internet Initiative Japan Inc.
 # All rights reserved.
@@ -312,15 +312,11 @@ add_test_tunnel_mode()
 	local ipproto=$1
 	local proto=$2
 	local algo=$3
-	local expected_failure=$4
 	local _algo=$(echo $algo | sed 's/-//g')
-	local name= desc= expected_failure_code=
+	local name= desc=
 
 	name="ipsec_tunnel_${ipproto}_${proto}_${_algo}"
 	desc="Tests of IPsec ($ipproto) tunnel mode with $proto ($algo)"
-	if [ "$expected_failure" = yes ]; then
-		expected_failure_code="atf_expect_fail 'PR kern/52161';"
-	fi
 
 	atf_test_case ${name} cleanup
 	eval "								\
@@ -329,7 +325,6 @@ add_test_tunnel_mode()
 	        atf_set \"require.progs\" \"rump_server\" \"setkey\";	\
 	    };								\
 	    ${name}_body() {						\
-	        $expected_failure_code					\
 	        test_tunnel_common $ipproto $proto $algo;		\
 	        rump_server_destroy_ifaces;				\
 	    };								\
@@ -352,10 +347,6 @@ atf_init_test_cases()
 
 	for algo in $AH_AUTHENTICATION_ALGORITHMS; do
 		add_test_tunnel_mode ipv4 ah $algo
-		if [ $algo = null ]; then
-			add_test_tunnel_mode ipv6 ah $algo
-		else
-			add_test_tunnel_mode ipv6 ah $algo yes
-		fi
+		add_test_tunnel_mode ipv6 ah $algo
 	done
 }