mark: fix invalid iptables-save output

When a neg mark is saved via iptables-save it is saved as !--mark,
but this is not recognized by iptables-restore, just adding a
space to the saved file to make it look like "! --mark" makes
iptables-restore accept the file.

Signed-off-by: Pablo Sebastian Greco <pablo@fliagreco.com.ar>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
1 file changed