[dovecot/core] 389f2b: NEWS: Add v2.2.35 release notes

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: 389f2b22c851b266db01aef9aec8bb67afdb71c8
      https://github.com/dovecot/core/commit/389f2b22c851b266db01aef9aec8bb67afdb71c8
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2018-03-19 (Mon, 19 Mar 2018)

  Changed paths:
    M NEWS

  Log Message:
  -----------
  NEWS: Add v2.2.35 release notes