Comment 3 for bug 1073138

There is an additional reason to use Origins-Pattern, which is that some package repos cannot be expressed with an Allowed-Origin: in particular, any repo which has a colon in its Origin field, for example the archive at www.openprinting.org, which has the origin field:

\http://www.openprinting.org/download/printdriver/debian/\

It is impossible to escape the colon to satisfy unattended-upgrade as an Allowed-Origin pattern, so rather than add another hack to unattended-upgrade, it would seem better to switch to using the Origins-Pattern setting instead.