Tell us about yourself!
Hi - I couldn't find that line either. I was using 'jessie' on an RPi model 1 as my base operating system. Installing motion on this didn't seem to give me the correct settings in motion.conf.I reinstalled with 'wheezy' version of Raspian, then installed motion..... and there they all were. It might have just been the re-install..... but I'm betting it was the version of motion that wheezy pulled in that solved the problem.