Block while waiting for connection

[maltalex]

At the moment, the client throws an exception if there are no free channels when a new request arrives. That makes sense in many scenarios, but in some cases, for instance when working with a pool of connections against some external API, it would be nice to have an option to put such requests in a queue or even block the requesting thread until a connection is available.

[slandelle]

AHC is async at its core, there's no way it will ever have a "blocking" feature.

I personally have zero usage for this, so I'll never implement such queueing system myself.

Contributions welcome

[slandelle]

Idle for a long time, so closing.
Will reopen if needed.