I am currently running nginx with php5-fpm on my local development ubuntu 13.10 system with 3.12.0 linux kernel. 
Before update, to set umask to 0002 for php5-fpm I edited /etc/init.d/php5-fpm file and added --umask arg to start-stop-daemon line.
After update it is ignored.
All points that now I run upstart instead of bare old system V scripts.
I tried to add umask 0002 to /etc/init/php5-fpm.conf but no luck