Description:
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It looks like php-fpm project changed configuration files format from xml to ini. But documentation page still has old data: http://php-fpm.org/wiki/Configuration_File

It is also incomplete (not all options are described there). While extensive options description available inside each ini file, I think, project page should hold them.

While documentation is wiki which everyone can edit, it would be good to have docs at least partially kept up-to-date or, if the authors of the project doesn't have time to update it, I think, there should be an invitation published on main project page to improve documentation.