Zperfmetrics

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- Nothing changed yet.

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- Event better naming in order to be able to group and stack:
Renamed ``publish.sum`` to ``publish_all`` and ``publish.transform_single`` to ``publish_transform_single``.
[jensens]

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- Cleanup names, better grouping in order to make graphing easier.
[jensens]

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- Enhancement: Introduce after-prefix a top level ``request_lifecycle`` to be consistent with levels.
[jensens]

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- Fix: Name of a single transform may contain dots.
They are now replaced by ``_``.
[jensens]

- Fix: The root element of a path was not shown on the same level as all other paths.
Now it is shown as ``__root__``
[jensens]

- Feature: It was not possible to filter by virtual host in environment with more than one site per Zope.
A new configuration option ``virtualhost`` was introduced.
If set to on, the virtualhost name will be inserted before ``PATH``.
[jensens]

- Support: In order to make a test installation easier,
an example docker-compose setup was added to the Github repository together with some documentation in the README.rst.
[jensens]

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- Added subscribers to ``plone.transformchain`` events.
New setup extra ``[plone]``.
Removed one patch for diazo transform.
Made ``publish.beforecommit`` less fuzzy in Plone.
[jensens]