Mem leak when releasing stream

[LYF1999]

h2/src/proto/streams/counts.rs

Lines 164 to 168 in 756384f

	// Release the stream if it requires releasing
	if stream.is_released() {
	stream.remove();
	}
	}

There may still leave some bytes releated to the stream in

h2/src/proto/streams/recv.rs

Line 52 in 756384f

buffer: Buffer<Event>,

when Counts remove a closed Stream.
This may cause mem leak, Should we remove bytes releated to the stream in remove function?

[LYF1999]

I am gald to submit a PR to fix that, but we can not access Recv in Counts. if we do that, it will be a large change commit.

[Millione]

@seanmonstar can we have a look?

[seanmonstar]

Sure!