[1.x] Support for batched configure requests in Streaming Plugin

[petarminchev]

We are very happy with the batch configure request in VideoRoom plugin - #2986.
For scaling purposes we rtp_forward to the Streaming Plugin. It would make our lives a lot easier if Streaming plugin supported batched configure requests. It is especially useful during paging - instead of sending dozens of requests to Janus, we will send only one configure request - which streams to be send: true/false. Also by looking at the VideoRoom pull request, it doesn't seem like a huge effort.
Could you consider adding batched configure requests to Streaming Plugin? We think it is a very valuable feature.

Thank you in advance!

[lminiero]

Well that patch wasn't small, and the Streaming plugin works a bit differently from the VideoRoom -- I wouldn't call it a "small effort" 😛
I can add it to the todo list but not sure when I'll have time to do that. I'd obviously be happy to review a pull request that implements this feature too.

[petarminchev]

@lminiero - Created a pull request - #3239. Seems to work for us, but of course you need to review it.

[lminiero]

Thanks! I'll try to do it later today.