Fix team join

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/commands/TeamCommand.java

@@ -162,7 +162,7 @@ public class TeamCommand extends SWCommand {
 
             for(int inv : invs){
                 Team team = Team.get(inv);
-                if(team.getTeamName().equals(args[0])){
+                if(team.getTeamKuerzel().equalsIgnoreCase(args[0]) || team.getTeamName().equalsIgnoreCase(args[0])){
                     t = inv;
                     break;
                 }