[dovecot/core] 799e04: apparmor: Add apparmor plugin

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: 799e0498e34e935773e0f81444eff26ea932a99d
      https://github.com/dovecot/core/commit/799e0498e34e935773e0f81444eff26ea932a99d
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2017-08-24 (Thu, 24 Aug 2017)

  Changed paths:
    M configure.ac

  Log Message:
  -----------
  apparmor: Add apparmor plugin

It lets dovecot temporarily switch to a new apparmor
context for a user.