[ingo] Disabling the default rules

[Joerg Friedrich]

Hi!
is there any possibility apart from editing the serialized value in
config/prefs.php to disable one or more default-scripts?
Reason: Our vacation is _not_ down on the imap message store but on a
postfix-server (mail-router) before. So we do not need to
sieve-vacations and do not want to confuse our users.
-- 
Jörg Friedrich
Eine Lösung habe ich. Leider paßt sie nicht zum Problem.