proxy_pass: avoid stuck responses in "proxy_buffering: false"

Another critical bugfix for this yet-to-be-released feature.
By the time we call proxy_unbuffer in proxy_read_body,
the req_res socket may be completely drained of readable data
and a persistent-connection-capable backend will be waiting
for the next request (not knowing we do not yet support
persistent connections).

This affects both chunked and identity responses from the
upstream.

0 files changed, 0 insertions, 0 deletions