Request: Disable update.bad.phishing.sites job when phishing checks are disabled

[Alex Broens]

Jules:

I've disabled all MailScanner phishing checks yet:

Apr 10 12:01:01 cobox-1 update.bad.phishing.sites: Delaying cron job up 
to 600 seconds

It would be very elegant if these are not enabled, the cron job is 
disabled as well.

same with AV signatures update hourly job.

thanks

Alex