If you currently running ViaVersion it's probably not worth updating to the following update as the fixes are rather small if it already works.

Change log:

• Reformat the config, it now has sections so you can understand what effects what.
• Change 1.9.3 to display as 1.9.3/4
• You can now make ViaVersion show the supported versions in the ping packet by changing a config value. (This would only help if you're building custom software, otherwise it's useless) (By @Matsv)
• Make it so that if you use craftbukkit it prevents you from being silly with having anti-xray on.

As always report bugs on GitHub, donations are appreciated.