[squid-users] Question on refresh_pattern and ignore must revalidate

[Skipcube]

Hi all,
I was planning to use a refresh pattern in squid 3.5 as follows:
refresh_pattern -i .(css|js)\?$                           1440  75%
40320 override-expire override-lastmod reload-into-ims ignore-no-cache
ignore-private ignore-must-revalidate

That is cache any CSS or JS file that ends with "?" with ignoring the
must revalidate flag.

However, I see that in Squid 4's documents:
http://www.squid-cache.org/Doc/config/refresh_pattern/
Removed ignore-must-revalidate. Other more HTTP compliant directives
can be used to prevent objects from caching.

What are the options in Squid 4 to achieve the behavior of
ignore-must-revalidate?

-Skip