[Checkins] [zopefoundation/zope.app.publisher] f5f878: Support more `ServerProxy` options.

[Steffen Allner]

  Branch: refs/heads/serverproxy-options
  Home:   https://github.com/zopefoundation/zope.app.publisher
  Commit: f5f87875285443906a32241c693296bc5c43c0a0
      https://github.com/zopefoundation/zope.app.publisher/commit/f5f87875285443906a32241c693296bc5c43c0a0
  Author: Steffen Allner <sa at gocept.com>
  Date:   2020-04-17 (Fri, 17 Apr 2020)

  Changed paths:
    M CHANGES.rst
    M setup.py
    M src/zope/app/publisher/xmlrpc/testing.py

  Log Message:
  -----------
  Support more `ServerProxy` options.

`use_builtin_types` is in particular handy for the migration to Python 3 as it returns a `xmlrpc.client.Binary` instead of bytes. This class is not present in Python 2.