[Checkins] [zopefoundation/Zope] 39c9db: - add a test (now I know why there were none)

[Jens Vagelpohl]

  Branch: refs/heads/prevent_header_spoofing
  Home:   https://github.com/zopefoundation/Zope
  Commit: 39c9db4340280925970d59a0b4508e564898baeb
      https://github.com/zopefoundation/Zope/commit/39c9db4340280925970d59a0b4508e564898baeb
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2020-02-06 (Thu, 06 Feb 2020)

  Changed paths:
    A src/ZServer/tests/test_HTTPServer.py

  Log Message:
  -----------
  - add a test (now I know why there were none)