Gocept-amqprun

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- Fixed bug in creating references header when parent message has no references
(10478).

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Features
~~~~~~~~

- Changed FileStoreReader from its own process to a thread that uses
gocep.amqprun for sending (previously it used amqplib). Introduced
``amqp:readfiles`` ZCML directive. (10177)

- Changed `filestore` extra to `readfiles` extra.

- Transmit filename as ``X-Filename`` header from ``amqp:readfiles``.

- Introduced ``ISender`` utility.

Bugs
~~~~

- Fixed bug with acknowledging messages that was introduced in 0.5 (10030).

Internal
~~~~~~~~

- Changed API for MainTestCase from ``create_reader`` to ``start_server``.

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- Bugfix to support unicode arguments for queue declaration as pika
only supports bytestrings here.
- Bugfix to make ``arguments`` parameter of ``amqp:writefiles`` work (10115).

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General
~~~~~~~

- Added `writefiles` extra to make ZCML directive ``amqp:writefiles`` optional.

- Added `filestore` extra to make ``gocept.amqprun.filestore`` optional.

- Moved declaration of ``amqp:writefiles`` from ``configure.zcml`` to
``meta.zcml``.


Features
~~~~~~~~

- Renamed ``gocept.amqprun.server.MessageReader`` into
``gocept.amqprun.server.Server`` and added a ``send`` method so it can
initiate sending of messages.

- Add support for arguments for queue_declare e.g to support x-ha-policy
headers for RabbitMQ mirrored queue deployments (10036).


Internal
~~~~~~~~

- Internal API change in ``server.AMQPDataManager.__init__``: the `message`
parameter is now optional, so it was moved to the end of the list of
arguments.

- Use plone.testing for layer infrastructure.

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- Add helper methods for dealing with header files to FileWriter (for 9443).

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- Log Message-ID.