Sorry but have you the real link which the snort.conf files?
I will search in my history because I was share to an asker for help on user e-mail snort,
From: Dorian ROSSE
Sent: Friday, January 18, 2019 3:20:29 PM
Subject: snort.conf missing
I checked on my two Ubuntu servers in snortVERSION folder and It miss at each servers the snort.conf file !
Thank you in advance to fix the problem,