Backport transit_buffer patch
This patch is already present in the 6.x-series deployments of Varnish at Wikimedia. The transit_buffer was introduced later than 7.1 so we're still needing to backport it.
Bug: T378737
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This patch is already present in the 6.x-series deployments of Varnish at Wikimedia. The transit_buffer was introduced later than 7.1 so we're still needing to backport it.
Bug: T378737