system-helper: Authenticate via polkit for system wide downgrades

Browse Source

Downgrading an app or runtime previously failed outright for non root
users calling through the system helper, with an error stating that
updating to a specific commit requires root permissions.

Instead, allow downgrades through the system helper by introducing a new
flag that is set when the caller requests a downgrade.
New "org.freedesktop.Flatpak.app-downgrade" and "runtime-downgrade"
polkit actions are added that require auth_admin_keep for active users.

...

This commit is contained in:

500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f