feat: Add per-server forwarding configuration

Reflect changes from PaperMC/Velocity#1357

Author: Timongcraft

docs/velocity/admin/getting-started/forwarding.md

@@ -17,10 +17,9 @@ UUIDs and skins. Velocity supports three forwarding formats:
 
 :::info
 
-You may choose between only one of these forwarding formats. It is not currently possible to "mix
-and match" forwarding modes or use all the forwarding formats together. In general, if you are
-supporting clients using Minecraft 1.13 and newer only, use Velocity modern forwarding, else you
-must use BungeeCord forwarding.
+It is now possible to configure forwarding individually for each server.
+In general, if you are supporting clients using Minecraft 1.13 and newer only, use Velocity modern forwarding.
+For older versions, consider using BungeeGuard for added security; else you must use BungeeCord forwarding.
 
 :::