Zope + ZEO + uWSGI + multi processes does not work

[MrTango]

As @tschorr mentioned in #284/#283 Zope (ZEO-Client) does work with uWSGI only if we don't use multiple processes controled by uWSGI. If this would work, uWSGI could handle all workers and start and stop them as they are needed. But as soon and one enables a master, which is needed when using multiple processes the application does not respond at all. Not sure why is that, but it would be awesome if could address this issue.