commit a5f18ede385f8f348d876635c8483640d6446d65
Author: Michael Cambria <mcambria@redhat.com>
Date:   Mon Jun 24 16:11:51 2019 -0400

    Remove iptables mode dependent existsErr code work-around.
    iptables fixed in iptables-1.8.1
    commit c19fa5833a0bc0eb787799634bd26dea91fcdca1

diff -up plugins-fe60fcddb897079746ec1523fd1837ab05b1e689/vendor/github.com/coreos/go-iptables/iptables/iptables.go.orig plugins-fe60fcddb897079746ec1523fd1837ab05b1e689/vendor/github.com/coreos/go-iptables/iptables/iptables.go
--- plugins-fe60fcddb897079746ec1523fd1837ab05b1e689/vendor/github.com/coreos/go-iptables/iptables/iptables.go.orig	2019-05-29 18:30:15.000000000 +0200
+++ plugins-fe60fcddb897079746ec1523fd1837ab05b1e689/vendor/github.com/coreos/go-iptables/iptables/iptables.go	2019-07-31 09:24:30.070738570 +0200
@@ -302,18 +302,13 @@ func (ipt *IPTables) NewChain(table, cha
 	return ipt.run("-t", table, "-N", chain)
 }
 
+const existsErr = 1
+
 // ClearChain flushed (deletes all rules) in the specified table/chain.
 // If the chain does not exist, a new one will be created
 func (ipt *IPTables) ClearChain(table, chain string) error {
 	err := ipt.NewChain(table, chain)
 
-	// the exit code for "this table already exists" is different for
-	// different iptables modes
-	existsErr := 1
-	if ipt.mode == "nf_tables" {
-		existsErr = 4
-	}
-
 	eerr, eok := err.(*Error)
 	switch {
 	case err == nil: