[Checkins] [zopefoundation/RestrictedPython] 2d1539: Stop using deprecated --use-mirrors

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/RestrictedPython
  Commit: 2d15393ab1957a9c12cc61bbe209f57e2a48bee8
      https://github.com/zopefoundation/RestrictedPython/commit/2d15393ab1957a9c12cc61bbe209f57e2a48bee8
  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