Non-Blocking Invocation in SignalR with MessagePack encoding

[MerzMax]

I think there might be a mistake in the docs for the SignalR Hub Protocol.

If an invocation isn't blocking the docs mentions that the Caller doesn't have to send an InvocationId with his request.

In the encoding for the MessagePack Invocation message is a parameter called NonBlocking. Its function is never mentioned and the examples don't use it as well.

The question I am asking myself is, if this parameter is used in any scenario and if, which value it might have.

[BrennanConroy]

Was just a previous piece of the spec from before the protocol was finalized.
Fixed in #23389

[MerzMax]

All right. Thanks for fixing the docs.