I've verified this fixed.
* launch a container
* add proposed
* install cloud-init from proposed
* dpkg-reconfigure
At that point you see
a. that OpenStack is selected (as it should have shown before)
b. unselecting it and exiting will remove it from
/etc/cloud/cloud.cfg.d/90_dpkg.cfg
c. doing it again and selecting it will write it back there.
I've verified this fixed.
* launch a container
* add proposed
* install cloud-init from proposed
* dpkg-reconfigure
At that point you see cloud/cloud. cfg.d/90_ dpkg.cfg
a. that OpenStack is selected (as it should have shown before)
b. unselecting it and exiting will remove it from
/etc/
c. doing it again and selecting it will write it back there.