from https://bugs.launchpad.net/zope2/+bug/699865 :

VirtualHostMonster does not work with IPv6 named hosts.

In case of such rewrite configuration:

RewriteRule (.*) http://10.0.243.129:9280/VirtualHostBase/https/[%{SERVER_ADDR}]:4080$1 [L,P]

When SERVER_ADDR is fd00::74ba VirtualHostMonster dies with:

Traceback (most recent call last):
  File "/eggs/Zope2-2.12.14-py2.6-linux-x86_64.egg/ZPublisher/BeforeTraverse.py", line 145, in __call__
    meth(*(container, request, None)[:args])
  File "/eggs/Zope2-2.12.14-py2.6-linux-x86_64.egg/Products/SiteAccess/VirtualHostMonster.py", line 154, in __call__
    host, port = host.split(':')
ValueError: too many values to unpack

This is because IPv6 addresses contain ":" in them.

--
This is backport of https://github.com/zopefoundation/Zope/pull/314 to
2.13 branch

This also include part of:
2e9d01ea - flake8 Products/Shared/ZTUtils.
removing test_suite function from the test