Update upstream source from tag 'upstream/1.8.1'

Update to upstream version '1.8.1'
with Debian dir f7eefdbc289bc01f3d8a1522cd469a3564de9051

iptables/tests/shell/testcases/ip6tables/0002-verbose-output_0

+#!/bin/bash
+
+set -e
+#set -x
+
+# ensure verbose output is identical between legacy and nft tools
+
+RULE1='-i eth2 -o eth3 -s feed:babe::1 -d feed:babe::2 -j ACCEPT'
+VOUT1='ACCEPT  all opt    in eth2 out eth3  feed:babe::1  -> feed:babe::2'
+RULE2='-i eth2 -o eth3 -s feed:babe::4 -d feed:babe::5 -j ACCEPT'
+VOUT2='ACCEPT  all opt    in eth2 out eth3  feed:babe::4  -> feed:babe::5'
+
+diff -u -Z <(echo -e "$VOUT1") <($XT_MULTI ip6tables -v -A FORWARD $RULE1)
+diff -u -Z <(echo -e "$VOUT2") <($XT_MULTI ip6tables -v -I FORWARD 2 $RULE2)
+
+diff -u -Z <(echo -e "$VOUT1") <($XT_MULTI ip6tables -v -C FORWARD $RULE1)
+diff -u -Z <(echo -e "$VOUT2") <($XT_MULTI ip6tables -v -C FORWARD $RULE2)
+
+EXPECT='Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
+ pkts bytes target     prot opt in     out     source               destination
+
+Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
+ pkts bytes target     prot opt in     out     source               destination
+    0     0 ACCEPT     all      eth2   eth3    feed:babe::1         feed:babe::2
+    0     0 ACCEPT     all      eth2   eth3    feed:babe::4         feed:babe::5
+
+Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
+ pkts bytes target     prot opt in     out     source               destination'
+
+diff -u -Z <(echo -e "$EXPECT") <($XT_MULTI ip6tables -v -n -L)
+
+diff -u -Z <(echo -e "$VOUT1") <($XT_MULTI ip6tables -v -D FORWARD $RULE1)
+diff -u -Z <(echo -e "$VOUT2") <($XT_MULTI ip6tables -v -D FORWARD $RULE2)
+
+EXPECT="Flushing chain \`INPUT'
+Flushing chain \`FORWARD'
+Flushing chain \`OUTPUT'"
+
+diff -u <(echo -e "$EXPECT") <($XT_MULTI ip6tables -v -F)
+
+EXPECT="Zeroing chain \`INPUT'
+Zeroing chain \`FORWARD'
+Zeroing chain \`OUTPUT'"
+
+diff -u <(echo -e "$EXPECT") <($XT_MULTI ip6tables -v -Z)
+
+diff -u <(echo "Flushing chain \`OUTPUT'") <($XT_MULTI ip6tables -v -F OUTPUT)
+diff -u <(echo "Zeroing chain \`OUTPUT'") <($XT_MULTI ip6tables -v -Z OUTPUT)
+
+$XT_MULTI ip6tables -N foo
+diff -u <(echo "Deleting chain \`foo'") <($XT_MULTI ip6tables -v -X foo)

iptables/tests/shell/testcases/ip6tables/0004-return-codes_0

+#!/bin/sh
+
+# make sure error return codes are as expected useful cases
+# (e.g. commands to check ruleset state)
+
+global_rc=0
+
+cmd() { # (rc, cmd, [args ...])
+	rc_exp=$1; shift
+
+	$XT_MULTI "$@"
+	rc=$?
+
+	[ $rc -eq $rc_exp ] || {
+		echo "---> expected $rc_exp, got $rc for command '$@'"
+		global_rc=1
+	}
+}
+
+# test chain creation
+cmd 0 ip6tables -N foo
+cmd 1 ip6tables -N foo
+# iptables-nft allows this - bug or feature?
+#cmd 2 ip6tables -N "invalid name"
+
+# test rule adding
+cmd 0 ip6tables -A INPUT -j ACCEPT
+cmd 1 ip6tables -A noexist -j ACCEPT
+
+# test rule checking
+cmd 0 ip6tables -C INPUT -j ACCEPT
+cmd 1 ip6tables -C FORWARD -j ACCEPT
+cmd 1 ip6tables -C nonexist -j ACCEPT
+cmd 2 ip6tables -C INPUT -j foobar
+cmd 2 ip6tables -C INPUT -m foobar -j ACCEPT
+cmd 3 ip6tables -t foobar -C INPUT -j ACCEPT
+
+exit $global_rc