Fix player reconnection to servers after quit. Mark server as obsolete earlier to avoid unnecessary packets from backend while switching servers

Author: Leymooo

proxy/src/main/java/net/md_5/bungee/ServerConnection.java

@@ -81,6 +81,7 @@ public void disconnect(BaseComponent... reason)
     {
         Preconditions.checkArgument( reason.length == 0, "Server cannot have disconnect reason" );
 
+        isObsolete = true;
         ch.close();
     }
 

proxy/src/main/java/net/md_5/bungee/ServerConnector.java

@@ -246,6 +246,11 @@ public static void handleLogin(ProxyServer bungee, ChannelWrapper ch, UserConnec
             user.getForgeClientHandler().setHandshakeComplete();
         }
 
+        if ( user.getServer() != null && user.getPendingConnection().getVersion() < ProtocolConstants.MINECRAFT_1_20_2 ) //BotFilter
+        {
+            user.getServer().setObsolete( true ); //BotFilter
+        }
+
         if ( user.isNeedLogin() || user.getPendingConnection().getVersion() >= ProtocolConstants.MINECRAFT_1_16 ) //BotFilter
         {
             // Once again, first connection
@@ -287,10 +292,6 @@ public static void handleLogin(ProxyServer bungee, ChannelWrapper ch, UserConnec
             user.setDimension( login.getDimension() );
         } else
         {
-            if ( user.getServer() != null ) //BotFilter
-            {
-                user.getServer().setObsolete( true ); //BotFilter
-            }
             user.getTabListHandler().onServerChange();
 
             Scoreboard serverScoreboard = user.getServerSentScoreboard();