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In H1/H2/FCGI, the *_get_buf() functions try to disable receipt of data when there's no buffer available. But they do so at the lowest possible level, which is unrelated to the upper transport layers which may still be trying to feed data based on subscription. The correct approach here would theorically be to only disable subscription, though when we get there, the subscription will already have been dropped, so we can safely just remove that call. It's unlikely that this could have had any practical impact, as the upper xprt layer would call this callback which would fail an not resubscribe. Having the lowest layer disabled would just be temporary since when re-enabling reading, a subscribe at the end of data would re-enable it. Backport should not harm but seems useless at this point.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)