MINOR: mux-h2: learn and store the peer's advertised MAX_CONCURRENT_STREAMS setting

We used not to take it into account because we only used the configured
parameter everywhere. This patch makes sure we can actually learn the
value advertised by the peer. We still enforce our own limit on top of
it however, to make sure we can actually limit resources or stream
concurrency in case of suboptimal server settings.
1 file changed