Upgrade to Ubuntu16.04 LTS from 14.04 LTS killed my php

[purvez]

Reinis thanks very much for your response.  The owner shown for :
/var/run/php/php7.0-fpm.sock is 33 & group is 33.  Both have read/write
access but other groups have no access rights.

I therefore added the following line at the beginning of nginx.conf

user 33 33;

However when I tried to restart nginx it failed and systemctl status says
that getpwnam("33") failed.  What have I done wrong here?

Thanks for your continued help.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,273798,273812#msg-273812