iptables-restore.8: missing -T in synopsis

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
iptables-restore.8: file to read from can be specified as argument

original bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1022228

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
iptables-{save,restore}: warn that -b/--binary isn't implemented

see also 296dca39be

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
iptables-save: actually parse -M/--modprobe option

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