heads up for clamavmodule users

[Mike Tremaine]

Just a heads up the ClamAV mirrors are slow today and it seems to have 
caused some partial downloads which seems to have confused the 
MailScanner -> clamavmodule monitor process. If your MailScanner stack 
stops processing mail and spits out

None of the files matched by the "Monitors For ClamAV Updates" patterns 
exist!

Then you need to either cleanup the problem or just switch to clamav 
instead of clamvmodule for now and it should be fine.

-Mike