fix a critical bug that caused firewall configs to not be read

- removed a debug statement
- remove null return type from FilterRuleEvaluator#lookup

src/main/java/dev/piotr_weychan/szlaban/firewall/FirewallModule.java

@@ -50,7 +50,7 @@ public final class FirewallModule extends AbstractModule {
 
     // read allowlist files
     for (String loc : Objects.requireNonNullElse(
-        firewallConfig.getStringList("allowlist"), new ArrayList<String>()
+        firewallConfig.getStringList("allowlists"), new ArrayList<String>()
     )) {
       try {
         allowLists.add(resolveFilterList(loc));
@@ -61,7 +61,7 @@ public final class FirewallModule extends AbstractModule {
 
     // read blocklist files
     for (String loc : Objects.requireNonNullElse(
-        firewallConfig.getStringList("blocklist"), new ArrayList<String>()
+        firewallConfig.getStringList("blocklists"), new ArrayList<String>()
     )) {
       try {
         blockLists.add(resolveFilterList(loc));

src/main/java/dev/piotr_weychan/szlaban/firewall/PacketInterceptorBehaviour.java

@@ -41,8 +41,6 @@ public class PacketInterceptorBehaviour extends AbstractBehaviour {
           // get player's IP
           InetAddress address = event.getPlayer().getAddress().getAddress();
 
-          ctx.plugin().getSLF4JLogger().info("Received packet from " + address.getHostAddress());
-
           // evaluate rules
           for (RuleEvaluator ruleEvaluator : ruleEvaluators) {
             if (ruleEvaluator.lookup(address) == RuleType.BLOCK) {

src/main/java/dev/piotr_weychan/szlaban/firewall/filter/FilterRuleEvaluator.java

@@ -17,13 +17,12 @@ public class FilterRuleEvaluator implements RuleEvaluator {
     this.v6trie = v6trie;
   }
 
-  @Nullable
   public RuleType lookup(@NotNull InetAddress address) {
     if (address instanceof Inet4Address addr4) {
       return v4trie.getRuleType(addr4);
     } else if (address instanceof Inet6Address addr6) {
       return v6trie.getRuleType(addr6);
     }
-    return null;
+    return RuleType.DEFAULT;
   }
 }