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Previously the callback was almost mandatory so it made sense to have it before the message. Now that it can default to the one declared in the trace source, most TRACE() calls contain series of empty args and callbacks, which make them suitable for being at the end and being totally omitted. This patch thus reverses the TRACE arguments so that the message appears first, then the mask, then arg1..arg4, then the callback. In practice we'll mostly see 1 arg, or 2 args and nothing else, and it will not be needed anymore to pass long series of commas in the middle of the arguments. However if a source is enforced, the empty commas will still be needed for all omitted arguments.
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)