heroku/heroku-buildpack-php — pull request #82 by winmillwill (2014-09-04 19:38:25+00:00)
Title: Set php-fpm listen.owner to match httpd user

I get an error about httpd not being able to access the php-fpm socket without this change. I'm not running this on heroku, so it may be that there's something about the daemon and nobody users and groups on the heroku platform that makes this work for some reason.