Upstream changed names of variables in /etc/os-release to correspond to
correct project name. It is no longer Lede but once again OpenWRT.

This macro should be used only in sections protected by FEATURE_GUARD.
This means that we do not have to handle backward compatibility for
ignore field.

Ups this won't work because exports are exported only to lower scripts
not back up so it can't be in separate file.

This implements support for new updater with relative URI and no model
variable.

This creates lists that can be included in to each other. This is done
by hack that original script calling one of these lists passes base URI
to access sources and that is later reused. This is how relative URI
should work in future but it is not completed now so we can overcome it
this way and have almost same support.

This also means that we no longer have to specify target branch for
lists because it no longer matters.

Fallback branch is for now dropped because we are not doing small build
at the moment. We should in future return to them but they will be
implemented differently then fallback branch is.

This also does some base list cleanup.

There has to be step between 3.x and 4.x version because of other
reasons than updater's incompatibility. That gives us possibility to
define new lowest supported version of updater-ng for 4.x releases.
Thanks to that we can remove some obsolete crap.

It is planned to bump minimal version of updater even higher as soon as
relevant updater's release is out.

This reverts commit ca16a82d.

I disagree!

Make lists general. Board specific packages are handled by lua not m4
that meanst that we have same lists for all boards and specific sections
are ignored/skipped depending on model variable.

Signed-off-by: Michal Hrusecky <Michal@Hrusecky.net>

Signed-off-by: Michal Hrusecky <Michal@Hrusecky.net>