[dovecot/core] 9af4aa: Released v2.2.31.rc1.

[GitHub]

  Branch: refs/heads/release-2.2.31
  Home:   https://github.com/dovecot/core
  Commit: 9af4aa2880f8b0605c0595944edcb05e85b9abf4
      https://github.com/dovecot/core/commit/9af4aa2880f8b0605c0595944edcb05e85b9abf4
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2017-06-20 (Tue, 20 Jun 2017)

  Changed paths:
    M NEWS
    M configure.ac

  Log Message:
  -----------
  Released v2.2.31.rc1.