Increasing window_size above initial_window_size #857
Description
In the current state of things, the receiver is expected to release capacity using FlowControl::release_capacity. The doc clearly says that increasing the window size above target window size results in an error.
However, I was not able to find such restriction by looking at the RFC Chapter 6.9 WINDOW_UPDATE. The RFC only says that stream-level window size can be changed using SETTINGS_INITIAL_WINDOW_SIZE frame, and that every modification of this value must be applied to active streams as well. For connection-level capacity, it must be increased using WINDOW_UPDATE frames.
I was wondering if we should expose an API to allow this for stream-level window size as well, or modify the existing FlowControl::release_capacity to allow the value going above the target. I am looking for a way to tweak stream-level window size dynamically for particular stream, without impacting all other streams.
What is your opinion on this?