[dovecot/core] 00bc30: lib-storage: add a mail user pre-deinit vfunc

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: 00bc3011bb9d6327329d97f96f81e8b76626afb8
      https://github.com/dovecot/core/commit/00bc3011bb9d6327329d97f96f81e8b76626afb8
  Author: Josef 'Jeff' Sipek <jeff.sipek at dovecot.fi>
  Date:   2017-05-18 (Thu, 18 May 2017)

  Changed paths:
    M src/lib-storage/mail-user.c
    M src/lib-storage/mail-user.h

  Log Message:
  -----------
  lib-storage: add a mail user pre-deinit vfunc

This allows plugins to perform checks right before the deinit call.