x/net/http2: Transport is leaking streams on broken Body [1.11 backport]

[gopherbot]

@bradfitz requested issue #27208 to be considered for backport to the next 1.11 minor release.

@gopherbot, please backport to Go 1.11.

[bradfitz]

Note that this is a tricky one: it requires an x/net cherry-pick followed by a manual bundle into std's net/http h2_bundle.go file.

/cc @dmitshur

[gopherbot]

Change https://golang.org/cl/154237 mentions this issue: [release-branch.go1.11] http2: don't leak streams on broken body

[gopherbot]

Closed by merging a4630153038d3cb8c57f83d95200aea356145cf5 to release-branch.go1.11.

[dmitshur]

Re-opening for bundling into standard library's net/http h2_bundle.go file.