Changed truncation behaviour to be less corrupting.

Author: ioquatix

lib/rubydns/handler.rb

@@ -65,8 +65,10 @@ def receive_data(data)
 @server.logger.warn "Response via UDP was larger than #{UDP_TRUNCATION_SIZE}!"
 
 # Reencode data with truncation flag marked as true:
-answer.tc = 1
-data = answer.encode.byteslice(0, UDP_TRUNCATION_SIZE)
+truncation_error = Resolv::DNS::Message.new(answer.id)
+truncation_error.tc = 1
+
+data = truncation_error.encode
 end
 
 self.send_data(data)