x/net/http2: http.Server.WriteTimeout does not fire if the http2 stream's window is out of space. [1.18 backport]

[gopherbot]

@mknyszek requested issue #49741 to be considered for backport to the next 1.18 minor release.

@davecheney The backport for 1.17 will go in sooner, and we'll file a separate issue for that. It'll definitely go into 1.18.1 when the milestone is opened, I just mean that the fix on tip will land in the 1.19 cycle (so when the tree opens in February).

@gopherbot Please open a backport issue for Go 1.17.

[mknyszek]

There's no 1.18.1 milestone yet, so CC @mknyszek (myself) just to keep it on my radar.

[cagedmantis]

Closing this as it was fixed before the 1.18 RC1. A backport request has been submitted for Go1.16.