Also sort servers for /glist all

proxy/src/main/java/com/velocitypowered/proxy/command/BuiltinCommandUtil.java

@@ -0,0 +1,21 @@
+package com.velocitypowered.proxy.command;
+
+import com.velocitypowered.api.proxy.ProxyServer;
+import com.velocitypowered.api.proxy.server.RegisteredServer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+class BuiltinCommandUtil {
+
+  private BuiltinCommandUtil() {
+    throw new AssertionError();
+  }
+
+  static List<RegisteredServer> sortedServerList(ProxyServer proxy) {
+    List<RegisteredServer> servers = new ArrayList<>(proxy.getAllServers());
+    servers.sort(Comparator.comparing(RegisteredServer::getServerInfo));
+    return Collections.unmodifiableList(servers);
+  }
+}

proxy/src/main/java/com/velocitypowered/proxy/command/GlistCommand.java

@@ -35,7 +35,7 @@ public class GlistCommand implements Command {
     } else if (args.length == 1) {
       String arg = args[0];
       if (arg.equalsIgnoreCase("all")) {
-        for (RegisteredServer server : server.getAllServers()) {
+        for (RegisteredServer server : BuiltinCommandUtil.sortedServerList(server)) {
           sendServerPlayers(source, server, true);
         }
         sendTotalProxyCount(source);

proxy/src/main/java/com/velocitypowered/proxy/command/ServerCommand.java

@@ -63,8 +63,7 @@ public class ServerCommand implements Command {
     // Assemble the list of servers as components
     TextComponent.Builder serverListBuilder = TextComponent.builder("Available servers: ")
         .color(TextColor.YELLOW);
-    List<RegisteredServer> servers = new ArrayList<>(server.getAllServers());
-    servers.sort(Comparator.comparing(RegisteredServer::getServerInfo));
+    List<RegisteredServer> servers = BuiltinCommandUtil.sortedServerList(server);
     for (int i = 0; i < servers.size(); i++) {
       RegisteredServer rs = servers.get(i);
       serverListBuilder.append(formatServerComponent(currentServer, rs));