8.0 release checklist / misc items

[lukebakken]

• Check out @bording's project for ideas:
  • AMQP 0-9-1 Channel (IModel) API with async methods #843 (comment)
  • https://github.com/bording/angora
• Check out @mgravell's projects for ideas:
  • https://github.com/mgravell/Pipelines.Sockets.Unofficial
  • https://github.com/StackExchange/StackExchange.Redis
• Consider reducing API surface and maintenance obligation by removing convenience extension methods, and methods like QueueDeclarePassive
• Ensure that channels (and, perhaps, connections) can be closed from event handlers, or, block those operations (Calling channel.CloseAsync from within AsyncEventingBasicConsumer handler causes deadlock #1567)