[Dovecot] Migration from 1.2.x -> 2.0.5 error: Unknown protocol: sieve

[Ralf Hildebrandt]

% /usr/dovecot-2/bin/doveconf -n -c /usr/local/etc/dovecot.conf
# 2.0.5: /usr/local/etc/dovecot.conf
doveconf: Warning: NOTE: You can get a new clean config file with: doveconf -n > dovecot-new.conf
...
verbose_proctitle = yes
version_ignore = yes
doveconf: Error: protocols: Unknown protocol: sieve
doveconf: Fatal: Error in configuration file /usr/local/etc/dovecot.conf: protocols: Unknown protocol: sieve

Can I ignore this? I patched 1.2.x with the managesieve patch, and I
built 2.0.5 from source and checked out pigeonhole-2.0 from mercurial.

I wonder where this error comes from, since:

# fgrep -i sieve /usr/local/etc/dovecot.conf
protocols = imap imaps pop3s managesieve
  mail_plugins = sieve quota trash mail_log fts fts_squat
  # Used by both the Sieve plugin and the ManageSieve protocol
  sieve=~/.dovecot.sieve
  sieve_dir=~/sieve
	
-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de