Comment 18 for bug 1633220

We did the verification for xenial and yakkety. Everything works fine.
Find the version information for both systems below.

--- xenial
$ uname -a
  Linux ubuntest 4.4.0-47-generic #68-Ubuntu SMP Wed Oct 26 19:39:52 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

$ doveconf | head -n 2
  # 2.2.22 (fe789d2): /etc/dovecot/dovecot.conf
  # Pigeonhole version 0.4.13 (7b14904)

$ dpkg -s dovecot-core
  Package: dovecot-core
  Version: 1:2.2.22-1ubuntu2.2

--- yakkety
$ uname -a
  Linux yakketest 4.8.0-27-generic #29-Ubuntu SMP Thu Oct 20 21:03:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
$ doveconf | head -n 2
  # 2.2.24 (a82c823): /etc/dovecot/dovecot.conf
  # Pigeonhole version 0.4.13 (7b14904)
$ dpkg -s dovecot-core
  Package: dovecot-core
  Version: 1:2.2.24-1ubuntu1.1