Bug#433624: apt: please allow release pinning for suite and codename fields

[Marc Haber <mh+debian-bugs@zugschlus.de>]

Package: apt
Version: 0.7.3
Severity: wishlist

Please allow pinning for suite and codename fields in Release files.

This is the Release file header for etch
(http://debian.debian.zugschlus.de/debian/dists/etch/Release):

Origin: Debian
Label: Debian
Suite: stable
Version: 4.0r0
Codename: etch

When I want to pin etch, I can pin for Version.

But this does not work for lenny and sid, since their release files
do not have a Version: field. To pin lenny and sid, I would need to
pin for Suite and/or Codename, which does not seem to be possible as
documented in apt_preferences(5).

Please add this possibility.

Greetings
Marc