Description:
------------
Both upstart and systemd are using SIGHUP as a default signal for reload action and the init scripts needs special configuration because FPM uses SIGUSR2 for reload.

Since SIGHUP is unused in FPM there's no harm in adding it as another reload signal.

Patch attached.

Applies to all supported versions of PHP.

Test script:
---------------
service php5-fpm reload

Expected result:
----------------
PHP FPM reloaded

Actual result:
--------------
PHP FPM in invalid state - main process crashed without killing children processes.