[squid-users] can't print openbsd gif

Hello,

I m trying to block jpg images and put an OpenBSD gif image
Now all jpg images can't be appear, so it is a good start, but there's
no OpenBSD gif that replace jpg images.
Can you help me please?

My squid.conf:
http_port 3128
visible_hostname proxy.reunion.re
cache_mgr here_at_we.go
acl all src 192.168.0.0/24
acl jpgimage urlpath_regex -i "/etc/squid/filetypes.txt"
cache_mem 32 MB
refresh_pattern . 70% 7200
minimum_object 0 KB
maximum_object 4096 KB
cache_dir ufs /var/squid/cache 50 16 256
http_access deny jpgimage
deny_info http://www.it2l.com/images/sticker-port-openbsd.jpg jpgimage
http_access allow all

thank's!