[Dovecot] Pigeonhole Sieve Extprograms Plugin

[dovecot at voidptr.de]

Hi,

I upgraded to Dovecot 2.2.9 from Debian's wheezy-backports today (which
should contain the "sieve_extprograms" plugin and thus also the
vnd.dovecot.{pipe,filter,execute} capabilities.

However when I add
require "vnd.dovecot.filter";
to my sieve script via managesieve, the server reports
error: require command: unknown Sieve capability: 'vnd.dovecot.filter'

What am I missing and what should I do to get pipe/filter/execute to
work?

postconf -n attached.

Nils
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# 2.2.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-042stab084.14 x86_64 Debian 7.4 
auth_verbose = yes
mail_location = maildir:~/Maildir:LAYOUT=fs
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
namespace {
  inbox = yes
  location = 
  mailbox Drafts {
    auto = subscribe
    special_use = \Drafts
  }
  mailbox Junk {
    auto = subscribe
    special_use = \Junk
  }
  mailbox Sent {
    auto = subscribe
    special_use = \Sent
  }
  mailbox Trash {
    auto = subscribe
    special_use = \Trash
  }
  prefix = 
  subscriptions = yes
}
passdb {
  args = scheme=SHA512-CRYPT username_format=%n /etc/dovecot/users
  driver = passwd-file
}
plugin {
  sieve = ~/.dovecot.sieve
  sieve_default = /var/lib/dovecot/sieve/default.sieve
  sieve_dir = ~/sieve
  sieve_global_dir = /var/lib/dovecot/sieve/
}
protocols = " imap sieve"
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
  }
}
service imap-login {
  inet_listener imaps {
    port = 0
  }
}
ssl = required
ssl_cert = </etc/ssl/certs/own/mail.pem
ssl_key = </etc/ssl/certs/own/mail.key
userdb {
  args = username_format=%n /etc/dovecot/users
  default_fields = home=/home/%n
  driver = passwd-file
}
protocol lmtp {
  mail_plugins = " sieve"
}
protocol lda {
  info_log_path = /var/log/dovecot-lda.log
  log_path = /var/log/dovecot-lda-errors.log
  mail_plugins = " sieve"
}
protocol imap {
  imap_client_workarounds = tb-extra-mailbox-sep tb-lsub-flags
}