We are using the netfilter MARK in IPsec & QoS and this
is causing conflicts.
Therefore, we use the highest bit in the IPS chain now
and clear it afterwards because we do not really care about
this after the packets have been passed through suricata.
Then, no other application has to worry about suricata.
Fixes: #12010 Signed-off-by: Arne Fitzenreiter <arne.fitzenreiter@ipfire.org> Signed-off-by: Michael Tremer <michael.tremer@ipfire.org> Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>