http2: don't leak streams on broken body

[euroelessar]

Updates golang/go#27208

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[euroelessar]

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Message from Gerrit User 5976:

Patch Set 1:

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Message from Gerrit User 5065:

Patch Set 1:

FYI: I'm just starting a few week vacation so I likely won't find time for this until I'm back.

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[gopherbot]

Message from Gerrit User 5065:

Patch Set 1: Run-TryBot+1

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Message from Gerrit User 5976:

Patch Set 1:

TryBots beginning. Status page: https://farmer.golang.org/try?commit=6ff1ed4b

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Message from Gerrit User 5976:

Patch Set 1: TryBot-Result+1

TryBots are happy.

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Message from Gerrit User 28859:

Patch Set 1:

Patch Set 1:

FYI: I'm just starting a few week vacation so I likely won't find time for this until I'm back.

I hope you've enjoyed your vacation, so friendly ping :)

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Message from Gerrit User 5065:

Patch Set 1: Code-Review+2

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[gopherbot]

This PR is being closed because golang.org/cl/132715 has been merged.