[Checkins] [zopefoundation/AccessControl] bb892f: - tweaks to appveyor config

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/AccessControl
  Commit: bb892fdc3bffe94df67c318e9972bc319fcccf71
      https://github.com/zopefoundation/AccessControl/commit/bb892fdc3bffe94df67c318e9972bc319fcccf71
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2017-11-27 (Mon, 27 Nov 2017)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  - tweaks to appveyor config