BUG11825: firewall: Renaming a network/host group doesn't update rules

BUG11825: firewall: Renaming a network/host group doesn't update rules

Code only changed field 6 of hash (target group) and not field 4 (source group).
Also if using geoip it was only field 4 of hash (source group) and not field 6 of hash (target group)
Added new code that changes both fields to reflect the change in the firewallrules immediately.

fixes: #11825

Signed-off-by: Alexander Marx <alexander.marx@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>