Merge branch 'revert-7827db36' into 'stable-3.1'

Pascal Dreissen

2016-07-08 6a00e0d41d0a7267878afa1b751427b26853e2f6

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check process hhvm_{SYSTEM_USER} with pidfile /var/run/hhvm/hhvm_{SYSTEM_USER}.pid
   start program = "/etc/init.d/hhvm_{SYSTEM_USER} restart"
   stop  program = "/etc/init.d/hhvm_{SYSTEM_USER} stop"