Cyrus 3.0 FUZZY search not working after upgrade from 2.5

[Jesper Schmitz Mouridsen]

> Hi List.
>
> I some time ago upgraded my imapd to 3.0.1 on FreeBSD 11
>
> y4 UID SEARCH RETURN (ALL) CHARSET utf-8 FUZZY SUBJECT test
> y4 OK Completed (0 msgs in 0.000 secs)
> y6 UID SEARCH RETURN (ALL) CHARSET utf-8 SUBJECT test
> y6 OK Completed (625 msgs in 0.766 secs)
>
> My understanding is that FUZZY in y4 should return all messages 
> with subject containing 'test'? Note that y6 returns 625 
> messages without the FUZZY key word.
>
> What could be wrong here, I'm not using xapian and have no 
> search_engine set in imapd.conf

I had to set squat to true with cyradm setinfo squat true,
and add search_engine: squat in imapd.conf. And then run squatter.
Now FUZZY searching works again.