The way it works is that you drop a file in /etc/update-manager/release-upgrades.d/
with the extension .cfg (e.g. /etc/update-manager/release-upgrades.d/my-config.cfg) that contains:
[Sources]
AllowThirdParty=yes
as the only lines. This will override the internal default.
This is fixed in bzr now.
The way it works is that you drop a file in /etc/update- manager/ release- upgrades. d/ manager/ release- upgrades. d/my-config. cfg) that contains:
with the extension .cfg (e.g. /etc/update-
[Sources]
AllowThirdParty=yes
as the only lines. This will override the internal default.