Typo

dovecot/keyproxy.go

@@ -91,7 +91,7 @@ func (s *KeyLookupProxy) Lookup(ctx context.Context, key string) (interface{}, b
 		return s.lookupUserdb(ctx, key[7:])
 	default:
 		log.Printf("unknown key %s", key)
-		return nil, false
+		return nil, false, nil
 	}
 }