Make attempts to access to unauthorized torrents more verbose.

trackerlogic.c

@@ -80,6 +80,11 @@ size_t add_peer_to_torrent_and_return_peers( ot_hash hash, ot_peer *peer, PROTO_
 
   if( !accesslist_hashisvalid( hash ) ) {
     mutex_bucket_unlock_by_hash( hash, 0 );
+    if( proto == FLAG_TCP ) {
+      const char invalid_hash[] = "d14:failure reason63:Requested download is not authorized for use with this tracker.e";
+      memcpy( reply, invalid_hash, strlen( invalid_hash ) );
+      return strlen( invalid_hash );
+    }
     return 0;
   }