Bug#1121031: apt should support reading config/source/list files from /usr

Package: apt
Version: 3.1.12
Severity: wishlist

Dear Apt developers,

currently Apt reads its configuration from /etc/apt/apt.conf{,.d} and 
its sources from /etc/apt/sources.list{,.d}.

Could Apt also support the so called "stateless" configuration pattern, 
i.e. reading the default configuration from /usr while allowing 
overriding it in /etc, giving system administrators a way to define 
local configuration without changing any distro-provided files?

In first approximation, this would mean falling back to 
/usr/lib/apt.conf{,.d} and /usr/lib/apt/sources.list{,.d} if their /etc 
counterparts do not exist.

Kind regards,

-- 
Gioele Barabucci