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When an informational response (1xx) is received, we must be sure to send it
ASAP. To do so, CF_SEND_DONTWAIT flag must be set on the response channel to
instruct the stream-interface to not set the CO_SFL_MSG_MORE flag on the
transport layer. Otherwise the response delivery may be delayed, because of the
commit 8945bb6c0 ("BUG/MEDIUM: stream-int: fix loss of CO_SFL_MSG_MORE flag in
forwarding").
Note that a previous patch (cf6898cd ["BUG/MINOR: http-ana: Don't wait to send
1xx responses generated by HAProxy"]) add this flag on 1xx responses generated
by HAProxy but not on responses coming from servers.
This patch must be backported to 2.2 and may be backported as far as 1.9, for
HTX part only. But this part has changed in the 2.2, so it may be a bit
tricky. Note it does not fix any known bug on 2.1 and below because the
CO_SFL_MSG_MORE flag is ignored by the h1 mux.
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)