v2.0.0-rc.4

Fixed

• Memory leak in Crystal's Hash implementation
• Accept x-delayed-exchange and x-delayed-messages as exchange type for delayed message the exchanges
• Bindings are sorted properly in the web interface
• Wait for followers to synchronize on shutdown of leader
• Shovel the exact number of messages available on start if delete-after=queue-length, not more
• Prevet a queue that's overflowing to consume too much resources
• Dead-lettering loop when publishing to a delayed exchange's internal queue #748
• Exchange federation tried to bind to upstream's default exchange
• Shovel AMQP source didn't reconnect on network failures
• Shovel ack all unacked messages on stop
• Accept custom certificate parameters in shovel URI such as: ?cacertfile=/tmp/ca.pem&certfile=/tmp/cert.pem&keyfile=/tmp/key.pem

Changed

• Merge the header field and properties.header fields when publishing messages in the web interface

Changes: v2.0.0-rc.3...v2.0.0-rc.4