StreamHandle::read() parsed the trailers only on the path without a
decompressor, so response->trailers stayed empty for a compressed
chunked response. Parse them in one place for both paths, and only
after the last chunk: after a failed read it waited another read
timeout for a trailer line, and parse_trailers_if_needed() called
before the end read body bytes as trailers.
yhirose
2e3cb0f985
