There are some security issues with Debian Jessie's Squid;
on source package squid3. So I build a backport.
Squid 3.5.x wants Libecap3, so I build a backport for that as well;
Squid used to install Squid 2.x. This version installs Squid 3.x. So there is
a transitional package.
Config files are installed in /etc/squid/ instead of /etc/squid3/.
The log files are now in /var/log/squid/ instead of /var/log/squid3/.
The cache is now in /var/spool/squid/ instead of /var/spool/squid3/. But you can configure Squid to use the old cache dir.
Note: If you want to build your own backport, keep in mind that libecap3-dev
conflicts with libecap2-dev.
Libecap2 and libecap3 will merrily coexist though.
Other dev libs you need;
libbsd-dev libc6-dev libcap-dev libc-dev-bin libcppunit-dev libexpat1-dev libkrb5-dev libltdl-dev libmysqlclient-dev libnfnetlink-dev libstdc++-4 libstdc++6-4 libxml2-dev linux-libc-dev