Bug#671503: APT repository format is not documented

[Jonathan Nieder <jrnieder@gmail.com>]

Michal Suchanek wrote:

> The sources.list is *the* file that specifies where to look for
> repositories, even for non-apt clients.

dselect uses a different format for /var/lib/dpkg/cmethopt and
/var/lib/dpkg/<method>/*.  Most of the other non-apt package managers
I know are apt clones.  If I remember correctly, reprepro can pull
from one APT repository to populate another and does not use
sources.list format, either.

Using the sources.list format to illustrate terminology doesn't seem
like a bad idea, though.

Hope that helps,
Jonathan