[Checkins] [zopefoundation/zc.i18n] cb5201: Stop using deprecated --use-mirrors

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zc.i18n
  Commit: cb520105a77123bc13390e3f6691f8c18eaf3d48
      https://github.com/zopefoundation/zc.i18n/commit/cb520105a77123bc13390e3f6691f8c18eaf3d48
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2015-11-08 (Sun, 08 Nov 2015)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Stop using deprecated --use-mirrors