In IPS mode rule actions need to be have the action 'drop' for the
protection to work, however this is not appropriate for all rules.
Modify the generator for oinkmaster-modify-sids.conf to leave
rules with the action 'alert' here this is appropriate. Also add
a script to be run on update to correct existing downloaded rules.
Fixes #12086
Signed-off-by: Tim FitzGeorge <ipfr@tfitzgeorge.me.uk> Tested-by: Peter Müller <peter.mueller@ipfire.org> Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org> Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>