Detect Synology FSxxxx devices as Synology and not linux

Synology has a line of NAS-boxes called Flashstation (FS1017, FS1018, FS3400, FS6400).
They are currently detected as generic Linux.

After editing includes/definitions/os.inc.php (Yes, I read the warning at the top about not editing it... ) our FS1017 is correctly identified.
All I edited was the line:

'SYNOLOGY-SYSTEM-MIB::modelName.0' => '/^(DS|RS*|FS*)/',

and added "|FS".

I'm aware my change will be overwritten the next time i update Observium.