Suppress warnings about cookies from Flickr

It seems that Flickr might be sending badly formed cookies. You'll see
warnings like this:

    WARN - Cookie rejected: "$Version=0; BX=73n9qa99ttchd&b=3&s=sf; $Path=/; $Domain=.flickr.com". Domain attribute ".flickr.com" violates RFC 2109: host minus domain may not contain any dots

The warnings are sporadic but can be very frequent, up to nearly all the time.
Since we're only downloading files, it seems safe to just ignore cookies.
Also save raw tag, not just sanitized version