8.0 release checklist / misc items

[lukebakken]

• [ ] Check out @bording's project for ideas:
  • https://github.com/rabbitmq/rabbitmq-dotnet-client/issues/843#issuecomment-632742124
  • 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 (https://github.com/rabbitmq/rabbitmq-dotnet-client/issues/1567)