[Checkins] [zopefoundation/zope.app.session] f38c90: Stop using deprecated --use-mirrors

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.app.session
  Commit: f38c906738a054970f080ee856dd3ac9a8206507
      https://github.com/zopefoundation/zope.app.session/commit/f38c906738a054970f080ee856dd3ac9a8206507
  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