Fix DroneCI support

.drone.yml

@@ -0,0 +1,9 @@
+kind: pipeline
+name: default
+
+steps:
+  - name: build
+    image: maven:3-eclipse-temurin-17
+    commands:
+      - mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
+      - mvn test -B

src/main/java/wtf/beatrice/limbomanager/listeners/CommandCanceller.java

@@ -4,13 +4,24 @@ import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerCommandPreprocessEvent;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class CommandCanceller implements Listener
 {
 
+    private final static String allowedCmdsRegex = "\\/(login|register|changepassword)\\b";
+    /*
+    first "/" is the command prefix
+    (login|register|...) means either one or the other
+    \b means end of word (end of string, whitespace, ...) so NO other characters (like /loginabc)
+     */
+
     @EventHandler
     public void onCommand(PlayerCommandPreprocessEvent event)
     {
-        // block literally all commands (except from proxy ones)
+        if(!event.getMessage().matches(allowedCmdsRegex))
+            // block all commands (except from proxy and allowed ones)
             event.setCancelled(true);
     }
 }