fallback uuid

[triesharder]

I'm receiving many warnings like this one:

[ServerListPlus] [Core] Unable to load favicon from URL: https://visage.surgeplay.com/bust/64/00000000000000000000000000000000 -> java.io.IOException: Server returned HTTP response code: 400 for URL: https://visage.surgeplay.com/bust/64/00000000000000000000000000000000

Can we have a option to set a fallback uuid or skin data for this kind of server response?