[Checkins] [zopefoundation/ZServer] f2cd9c: Try with version pin.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/ZServer
  Commit: f2cd9ca56355b4cc4126e8f71ae94a6c6772ecc0
      https://github.com/zopefoundation/ZServer/commit/f2cd9ca56355b4cc4126e8f71ae94a6c6772ecc0
  Author: Hanno Schlichting <hanno at hannosch.eu>
  Date:   2017-09-09 (Sat, 09 Sep 2017)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Try with version pin.