[squid-users] squid dstdomain www. regex

is there a way for me to block a list of domains that's reside in
outside file and somehow append a small regular expression in front of
it.
the problem is that list contains only domains and if i use dstdomain
then people put www. in front of domain and squid doesn't catch it :(

any solution?

-- 
http://alexus.org/