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)