2.3.17 - breaks with fts-xapian.

[Juan Felipe Arjona]

Hello:

I just upgraded my Debian server with dovecot 2.3.17, and it breaks when 
using the plugin fts-xapian.

Apparently is a bug in Dovecot, please see:


https://github.com/grosjo/fts-xapian/issues/99


Thanks,


Juan