Is this possible?

I'm using squid-2.3S3 on FreeBSD-R4.
There is some sites that squid can't retrieve diretly,
I must use parent proxy to solve this.Now I have some
sites defined to use "never-direct".But if sometime there
is a new sites need to use parent proxy to be retrieved,
I must add this sites manully.What I want is:
if squid can't retrieve a site in a limited time,he then
forward the request to parent automatically.

Is this possible?
I think this is a useful function.
----------------------------------------------
欢迎您使用 百家商务电子邮件系统 http://www.email.com.cn
Welcome to E-mail business system
Received on Wed Jun 28 2000 - 02:06:10 MDT