This isn't an ask to change upstream. This is an ask on how to do it local since there's already 20 other options in the custom DNS filter dropdown I don't use, and just need to get 1-2 extras in there that I would use. Not to mention, I can just mount configs in place like other addons that can be installed. The userbase reference also makes me wonder, how many people actually use the numerous dns filter dropdown options? Having that many seems like a waste of NVRAM too then if you ask meYes, and every byte of storage DOES matter in this case. An RT-AC68U running with basic configuration typically has less than 2 KB of NVRAM space left, and users are frequently running out of NVRAM space already.
Adding a fourth custom server would add:
That's 50 bytes for something that maybe 3 persons in the entire userbase could use. Make that 100 bytes for the two settings you wanted added. That's significant in a scenario where we are talking about routers actively running out of nvram space already. 100 bytes would be enough for these users running out of NVRAM to add an extra 2-3 DHCP static leases, for example.
This is not worth it.