Add some comments about the new legacy ping passthrough code.

Author: TheMiningTeamYT

proxy/src/main/java/com/velocitypowered/proxy/connection/util/ServerListPingHandler.java

@@ -84,6 +84,7 @@ private CompletableFuture<ServerPing> attemptPingPassthrough(VelocityInboundConn
 
     CompletableFuture<List<ServerPing>> pingResponses = CompletableFutures.successfulAsList(pings,
         (ex) -> fallback);
+    // Use the new ping passthrough mode if enabled.
     if (mode.enabled()) {
       return pingResponses.thenApply(responses -> {
         // Find the first non-fallback. If it includes a modlist, add it too.
@@ -142,6 +143,7 @@ private CompletableFuture<ServerPing> attemptPingPassthrough(VelocityInboundConn
         return fallback;
       });
     } else {
+      // Otherwise, use the legacy ping passthrough mode.
       switch (legacyMode) {
         case ALL:
           return pingResponses.thenApply(responses -> {