iptables: fix wrong error messages

iptables -P INPUT
iptables v1.4.15: -X requires a chain and a policy
Try `iptables -h' or 'iptables --help' for more information.

Note that it says -X when we have used -P.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2 files changed