Hello,
The recent netflow question, reminded me that I needed to finish configuring nfsen on our box. I started going through the process of configuring observium, but no matter what I put in the config file, the suffix would not be removed.
Digging into the code it looks like the logic was there in the /html/includes/functions.inc.php to check and use strstr to remove the domain name.
But the string that was created was never actually used to open the rrd file.