[squid-users] Is there a way to ignore incoming If-Modified-Since request?

[Dave Dykstra]

I have tried playing around with reply_header_access and
request_header_access, and looking for other options having to do
with "ims" or "revalid" but have not had any luck finding an option
to ignore If-Modified-Since headers in requests from clients.  Is
there a way to do it?  Alternatively it would work for me to ignore
Last-Modified headers from the upstream server.

The reason I am asking is for a squid instance using rock cache where I
want to make sure that this bug (or I guess you could call it a feature
since it is documented behavior) related to collapsed forwarding is
avoided:
    https://bugs.squid-cache.org/show_bug.cgi?id=4890
Collapsed forwarding is very important for my applications but in this
case If-Modified-Since is not important.

Thanks,

Dave