XREAD returns dedicated status if it blocks

[torwig]

In order to be consistent with such blocking commands like BLPOP and BRPOP.

[PragmaTwice]

LGTM, however, I wonder if there could be some test cases to identify this change (if it is not hard to add).

[torwig]

@PragmaTwice No because it worked correctly even without this change :)
In this case, the loop wasn't stopped on s.Is<Status::BlockingCmd>() clause. But, according to the code, the actual reply wasn't sent because the reply variable remained empty.

[PragmaTwice]

got it.

[torwig]

Merging...